Fixes #27104

Also add
- CommonConversion.IsImplicit
- Compilation.HasImplicitConversion
Fixes #9461

Tuple support for DeclarationNameCompletionProvider (name suggestion)

Minor update for 'Generate delegate constructor' refactoring

Fix initialization in CSharpReplIntellisense

Merged on behalf of @svick Thanks!

Fixes #27128

Enable integration tests

Show parameter documentation for delegates in Signature Help

Unskip tests previously fixed

Handle expression body in PartialMethodCompletionProvider

Suggest parameter documentation tags on delegates

Merge dev15.8-preview2 to master

Fix assembly binding redirection in AnalyzerRunner

Several tests fixed by 8eb40095 remain skipped. This change unskips the remaining tests.

Closes #20219

Fix issue with generate-method inside a lambda.

When computing method references ignore nulls

Merge dev15.7.x to dev15.8-preview2

Fix for build failure

The CodeLensReferencesService when computing the mehtod references
should ignore any null method descriptors. These can occur if the
reference is not part of a method body (for example docstring
<see cref="method"/> tags).

Do not offer to simplify a foreach collection initializer.

Fixes #26907

Add TextDocument.GetText[Version]Synchronously

Merge dev15.8-preview2 to master

Merge dev15.7.x to dev15.8-preview2