…res/required-members

* upstream/main: (66 commits)
  Fix #55183: Add SymbolVisitor<TArgument, TResult> (#56530)
  Simplifier options (#60174)
  Remove duplicated asset
  Do not try to refcount solution syncing when communicating with OOP
  Delay symbol-search index updating until solution is fully loaded.
  add more miscellaneous tests for checked operators (#60727)
  Support checked operators in explicit interface implementation (#60715)
  Avoid formatting diagnostics with raw strings (#60655)
  Make heading levels for warning waves documentation consistent (#60721)
  Clean up IDiagnosticService extension methods
  Remove #nullable enable
  Add integration test to flag MEF composition breaks
  Generate static abstract interface members correctly (#60618)
  Merge release/dev17.2 to main (#60682)
  Fix FAR on checked operators (#60698)
  Add implement interface support for checked operators and cast operators (#60719)
  Update csc.dll path in launch.json (#60663)
  Grab bag of UTF8 string support in IDE features (#60599)
  Allow code actions to retrieve options for any language (#60697)
  Fix flaky VSTypeScriptHandlerTests  (#60706)
  ...

…o setsrequiredmembers

* upstream/features/required-members: (66 commits)
  Fix dotnet#55183: Add SymbolVisitor<TArgument, TResult> (dotnet#56530)
  Simplifier options (dotnet#60174)
  Remove duplicated asset
  Do not try to refcount solution syncing when communicating with OOP
  Delay symbol-search index updating until solution is fully loaded.
  add more miscellaneous tests for checked operators (dotnet#60727)
  Support checked operators in explicit interface implementation (dotnet#60715)
  Avoid formatting diagnostics with raw strings (dotnet#60655)
  Make heading levels for warning waves documentation consistent (dotnet#60721)
  Clean up IDiagnosticService extension methods
  Remove #nullable enable
  Add integration test to flag MEF composition breaks
  Generate static abstract interface members correctly (dotnet#60618)
  Merge release/dev17.2 to main (dotnet#60682)
  Fix FAR on checked operators (dotnet#60698)
  Add implement interface support for checked operators and cast operators (dotnet#60719)
  Update csc.dll path in launch.json (dotnet#60663)
  Grab bag of UTF8 string support in IDE features (dotnet#60599)
  Allow code actions to retrieve options for any language (dotnet#60697)
  Fix flaky VSTypeScriptHandlerTests  (dotnet#60706)
  ...