Add bunch of exclusions to dead code analysis for special methods

Merge dev16.0.x to dev16.0-preview2

Adding new training data and updating training scenarios

Unused members analyzer: Do not flag write-only properties that are n…

Add csharp_prefer_braces to .editorconfig

Workaround in RemoveUnusedMembersDiagnosticAnalyzer for VB handles cl…

Fix IndexOutOfRange exception in InvocationExpressionSignatureHelpProvider

Fixes #30886: Bail oun special serialization constructors and methods with certain special attributes indicating special usage.

Fixes #30887: Bail out on ShouldSerializeXXX and ResetXXX pattern that was also excluded from legacy FxCop implementation and seems to be common in real world code.

Fixes #30377 : Bail out on methods with signature matching event handlers, which are very common in Web apps.

Allow VisualStudioExperimentationService to initialize on a background thread

Handle event symbols with explicit interface implementation in unused…

Closes #30908

* Reorder PasteTrackingHandler so that FormatDocument does not dismiss it

* Added PasteTracking test to check format on paste scenario

* Documented why PasteTrackingPasteCommandHandler was ordered before FormatDocumnet.

Fix the lifetime of IntegrationService

Ensure PinnedRemotableDataScope is disposed

Gracefully handle project systems not giving us a file path

Fixes #30894

Fixes #30965

Fixes #30895

This analyzer does not function correctly in presence of VB handles clause due to IOperation bugs #30978 and #30979. This change adds a temporary workaround to the analyzer to handle this case specially.

TODO: File a bug to track reverting the temporary workaround once #30978 and #30979 are fixed.

Fixes #30271