Move refactorings to common helpers

Remove features/lspSupport from publishing to myget

Fix bad merge

Update filename to match contained type.

* EnC support of static local functions

* code review feedback

* StatementMatchingTests

* StatementEditingTests

* ActiveStatementTests

* tests with await

* code review feedback

Make refactoring boilerplate more consistent.

Enable code actions to configure code style options and diagnostic severity from light bulb

Fix missing nullable annotations

Update src/Features/CSharp/Portable/UseExpressionBodyForLambda/UseExpressionBodyForLambdaCodeRefactoringProvider.cs

Add ref var decl detection for for/foreach

Unskip tests around tuple nullable annotations

Now that https://github.com/dotnet/roslyn/issues/36047 is fixed, unskip
type inferrer tests.

Ensure that IVsContainedLanguage.SetHost(null) won't fail a second time

Fixes https://github.com/dotnet/roslyn/issues/37176

Remove the AbstractIndenter type (and subtypes).

Add feature to introduce a local variable immediately after writing its initializer.

Fixes https://github.com/dotnet/roslyn/issues/37179