Fixes #6303
Related: KirillOsenkov/MSBuildStructuredLog#653

Context
Assembly loading logging for:
Task runs - including loads in separate app domain for AppDomainIsolatedTask
Except for tasks runs in OutOfProcessRaskHostNode - as neither LoggingService nor LoggingContext are available there - not sure if not supporting those is a problem.
Sdk resolving (explicitly skipping resolvers defined in Microsoft.Build assembly)
Loggers initialization (explicitly skipping resolvers defined in Microsoft.Build assembly orwithin Microsoft.Build.Logging namespace) - Note - loggers initialiation reordered - Binlog is the first one - as assembly load events are emited at the time of each logger initialization, currently LoggerService dispatches events immediately after construction, so as a result order of logger definitions matter (only the earlier initialized gets messages about latter ones initialization assembly loads). Alternative would be to change the LoggerService contract to start dispatching on explicit request (easy to implement and preserving current MSBuild behavior - however might be potentially breaking for API users?) or to cache those events and log them later (doable, but convoluted - probably not worth the efforts now)
Evaluation
Samples
task run:

Assembly loaded during TaskRun: System.Diagnostics.Debug, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a (location: C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Diagnostics.Debug\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Diagnostics.Debug.dll, MVID: bc6b825d-5f99-464e-a06d-e3ae4b860a34, AppDomain: [Default])
evaluation:

Assembly loaded during Evaluation: System.Collections.Immutable, Version=7.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a (location: C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.2\System.Collections.Immutable.dll, MVID: 5a4c54a3-2092-428e-89cc-a391fd9d398a, AppDomain: [Default])
logger initialization:

Assembly loaded during LoggerInitialization (MyLoggers.BasicFileLogger): System.Reflection.Metadata, Version=7.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a (location: C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.2\System.Reflection.Metadata.dll, MVID: c602a8ce-3890-40fc-aa9b-fa3c23f81aab, AppDomain: [Default])
custom sdk resolver (no sample - similar to logger initialization)

Perf impact
No observable impact.

MSBUILDLOGALLASSEMBLYLOADS is used to turn on loggin of all assembly loads
build command: msbuild.exe <proj> /nodeReuse:false /bl
Scenario	Mean Duration
Orchard - MSBuild main	00:00:59.25
Orchard - curr branch	00:00:58.30
Orchard - curr branch, all loads	00:00:58.30
Console - MSBuild main	00:00:01.08
Console - curr branch	00:00:01.09
Console - curr branch, all loads	00:00:01.10