Changes: dotnet/dotnet@67ecf9e...db3b742

Bump to dotnet/dotnet@db3b742425

- **Dependency Updates**:
  - From [11.0.0-alpha.1.26055.114 to 11.0.0-alpha.1.26060.102][1]
     - Microsoft.NET.Workload.Mono.ToolChain.Current.Manifest-11.0.100-alpha.1
     - Microsoft.NET.ILLink
     - Microsoft.NETCore.App.Ref
  - From [11.0.0-beta.26055.114 to 11.0.0-beta.26060.102][1]
     - Microsoft.DotNet.Build.Tasks.Feed
  - From [0.11.5-alpha.26055.114 to 0.11.5-alpha.26060.102][1]
     - Microsoft.DotNet.Cecil
  - From [11.0.100-alpha.1.26055.114 to 11.0.100-alpha.1.26060.102][1]
     - Microsoft.NET.Sdk
     - Microsoft.NET.Workload.Emscripten.Current.Manifest-11.0.100-alpha.1
  - From [11.0.100-alpha.26055.114 to 11.0.100-alpha.26060.102][1]
     - Microsoft.TemplateEngine.Authoring.Tasks

This updates the codebase to target `net11.0` as the default,
including support for `net11.0-android`.

**Target framework and SDK updates:**

* Set the default target framework to `net11.0` and the stable target
  to `net10.0` in `Directory.Build.props` and pipeline variables.

* Added constants for latest and previous .NET target frameworks in
  `XABuildConfig.cs.in`.

* Updated `PREPARE_NET_FX` in `Makefile` and improved workload
  manifest handling for `net10` in `xaprepare`.

**CI and build improvements:**

* Updated CI YAML templates to only run
  `prepare-external-git-dependencies` for non-forked PRs.

* Added NuGet package source for dotnet/runtime 9.0.12.

**Documentation and templates:**

* Updated documentation and issue templates to reference
  `net11.0-android` and use the new default target framework in
  examples.

**Other configuration updates:**

* Set `TargetsCurrent=true` in `Directory.Build.props` as a temporary
  workaround for a known SDK issue.

* Updated the default .NET SDK version for CI to 10.0.

[1]: dotnet/dotnet@67ecf9e...db3b742

Local builds would generate hundreds (nearly 700) of messages similar to these:

    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: The following element in the template.json will not be included in the localizations because it does not match any of the rules for localizable elements: //$schema
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: The following element in the template.json will not be included in the localizations because it does not match any of the rules for localizable elements: //$schema
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: The following element in the template.json will not be included in the localizations because it does not match any of the rules for localizable elements: //$schema
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: The following element in the template.json will not be included in the localizations because it does not match any of the rules for localizable elements: //$schema
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: The following element in the template.json will not be included in the localizations because it does not match any of the rules for localizable elements: //$schema
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: The following element in the template.json will not be included in the localizations because it does not match any of the rules for localizable elements: //$schema
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: Adding into localizable strings: //author
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: Adding into localizable strings: //author
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: Adding into localizable strings: //author
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: Adding into localizable strings: //author
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: The following element in the template.json will not be included in the localizations because it does not match any of the rules for localizable elements: //classifications
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: The following element in the template.json will not be included in the localizations because it does not match any of the rules for localizable elements: //classifications
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: The following element in the template.json will not be included in the localizations because it does not match any of the rules for localizable elements: //classifications
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: The following element in the template.json will not be included in the localizations because it does not match any of the rules for localizable elements: //identity
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: Adding into localizable strings: //author
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: Adding into localizable strings: //author
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: Adding into localizable strings: //name
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: The following element in the template.json will not be included in the localizations because it does not match any of the rules for localizable elements: //classifications
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: The following element in the template.json will not be included in the localizations because it does not match any of the rules for localizable elements: //classifications
    Microsoft.TemplateEngine.TemplateLocalizer.Core.TemplateStringExtractor: Adding into localizable strings: //description

Disable the localizer for local builds by default.

In order to rebuild them it is necessary to build the templates project in 
one of the following ways:

   * On Unix systems run `make LOCALIZE_TEMPLATES=true prepare all` (the `prepare` parameter
     can be omitted if it was ran previously)
   * On all systems run `dotnet-local.sh -p:LocalizeTemplates=true -t:ConfigureLocalWorkload build-tools/create-packs/Microsoft.Android.Sdk.proj`

This failed with:

    Microsoft.NET.TargetFrameworkInference.targets(188,5): error NETSDK1045:
    The current .NET SDK does not support targeting .NET 11.0.
    Either target .NET 10.0 or lower, or use a version of the .NET SDK that supports .NET 11.0.
    Download the .NET SDK from https://aka.ms/dotnet/download

This step doesn't *need* to use .NET 11, so...

I think we can use `$(DotNetStableTargetFramework)` in this project
to avoid this problem for now.