Avoid sharing ReferenceManager across script compilations that do not share previous submission. (#43405)

Simplify options used in tests

Merge release/dev16.6 to master

Enabled partial ngen for LanguageServices

Remove public API on DocumentOptionSet

Add telemetry for Tools->Options generate editorconfig

🧹 Simplify import of Microsoft.VsSDK.targets

🐇 Avoid passing options to formatting rules

Remove some shims that were being used by Live Unit Testing

Update comment text

Update comment text

Support CompletionProvider in NuGet packages

Move CodeStyle layer to Microsoft.CodeAnalysis 3.6.0

Fix 'Use Index' and 'Use Range' analysis for projects with multiple definitions

Use safe handles for SQLite interop

- Microsoft.DotNet.Arcade.Sdk: 1.0.0-beta.20213.4 -> 1.0.0-beta.20215.5
Co-authored-by: Ndotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

Allow the DeclareAsNullable code fix to work for CS8618

Add hover support for razor lsp

Show the user how their actual format string will format a DateTime

https://github.com/dotnet/roslyn/pull/42931 added this API as we thought converting the base `OptionSet` type's abstract method to non-abstract and removing the override on `DocumentOptionSet` would be a binary breaking change for callers. However, based on the public API review meeting, it was identified that it would indeed not be a breaking change as the compiler would have emitted a callvirt to `OptionSet.GetOption`.