Fix crash that would happen when renaming in mixed f#/c# project.

Bugfixes for ConvertSwitchStatementToExpression

Fixes #37949 (leave open for offering the fix instead of bail out)
Fixes #37950 (will be resolved on the compiler side)
Fixes #36876
Fixes #37873
Fixes #37872
Fixes #37907
Fixes #37947
Closes #36877 (duplicate of #37873)

Update config for snap

Check language version on relaxed ordering of parameter modifiers

- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.19501.4

Delete some dead code from the rename test harness

Feature/add import annotation

This scenario is just testing the core engine, so there's no reason to
be involving text buffers.

Fixes #38686

Make AddImports internal.

Fix regression in RemoveUnusedParametersAndValues analyzer

My previous PR #38666 to improve performance for the analyzer introduced a functional regression in SymbolUsageAnalysis, which is fixed by this change.

Disable IDE dispose analyzers by default

Fix server capabilities initialization and remove previous experiment…

We are going to disable the DFA based IDE dispose analyzers (IDE0067, IDE0068 and IDE0069) by default as they need more performance tuning to handle large method bodies (method bodies which are 1000s of lines of code) with large control flow graphs.

#38984 has been filed to track turning these analyzers back on by default when the issue has been fixed.

Merge release/dev16.4-preview1 to master

Remove experimentation for file rename with inline rename

Example failure: https://devdiv.visualstudio.com/DevDiv/_git/VS/pullrequest/204591?_a=overview

These changes remove some dependencies that were added as part of this change , making Microsoft.VisualStudio.LanguageServer.Protocol and Microsoft.VisualStudio.LanguageServer.Protocol.Extensions depend on the same versions that VS provides. These binaries are intended to be versioned differently, and we ingest at a different cadence than VS. Once VS updated these dependencies we started to see NGEN failures with dll dependency resolution.

Downgrade language version to 7.3 for things < netcoreapp3.0 or netstandard2.1

Fixes #38966 

Add API Review notes

- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.19480.3

packages

Allow disabled by default analyzers to be enabled with editorconfig e…

Spelling fixes

Simplify parsing of attributes