NRT enable symbolfinder/find-refs code.

…rting NFE (#61792)

* Convert connection lost exceptions to cancellations to avoid overreporting NFE

* Typo and comment

* Feedback

* Refactoring

* Avoid accessing Document from formatter services

* Push async higher

* Split file

* Rename

…ication

Merge main to main-vs-deps

Recently we enabled FixAll functionality for a bunch of code refactorings. We have been seen intermittent failures in CI for the FixAll tests added for this. I was able to reproduce the failures locally quite consistently by running the test under a loop with thousands of iterations. Upon investigation it was found that when the test fails, the [underlying CWT](https://github.com/dotnet/roslyn/blob/73de4e98d3020c72a2eef479d267357c15332d80/src/Compilers/Core/Portable/Syntax/SyntaxNodeExtensions_Tracking.cs#L18) used by TrackNodes functionality seems to have cleared the entries for nodes requested to be tracked by this FixAll operations. Adding a ToArray invocation to the tracked nodes to realize the nodes into an array seems to ensure that this doesn't happen and the test passes consistently after this change.

Ideally, we would have expected the `SyntaxEditor.OriginalRoot` to keep all the nodes in the original tree alive, but that doesn't seem to be the case. Long term, we may want to consider adding a new TrackNodes API that does the tracking using dictionaries instead of CWTs and returns a disposable tracker object, such that the caller explicitly controls the lifetime of the tracking.

* Add support for additional file diagnostics in workspace pull

* fix formatting

* Fix more formatting

…ed string

…in inheritance

Use 'Clear' to empty a CWT when on .net core

Closes #61486.

* Remove serialization

* Workspace tests refactoring, add public option tests

* Remove usage of Workspace.SetOptions from tests

* Fix

* Remove Workspace.SetOptions

* Remove serializable options from SerializableOptionSet

* Cleanup

* Merge WorkspaceOptionSet into SerializableOptionSet

* Rename

* IOptionService

* Remove unused obsolete Razor EA API

* Remove

* Formatting

* Feedback

Support embedded languages on named attribute arguments

Fix logic issue in find-refs that could fail to find related symbols in inheritance

Merge main to main-vs-deps

Merge CompletionServiceWithProviders into CompletionService

Merge main to main-vs-deps

Remove crash workaround in `.editorconfig`

✨ Implement ImmutableSegmentedHashSet<T>

Add LegacyGlobalOptionsWorkspaceService for OmniSharp EA

Merge main to main-vs-deps

Merge main to main-vs-deps