Adds a new optional  `CodeActionProviderMetadata`.  This is passed in`registerCodeActionProvider` and contains a list of`CodeActionKinds` that the provider may return. The list is used for deciding when to show the `refactor` and `source action` context menus. It is not used for filtering the returned code actions

Possibly helps address #45383

Fixes #47621

Adds the concept of a source code action that applies to an entire file. Does not show these actions in the lightbulb menu by default

Fixes #47240

These diagnostics should only ever be downgraded from errors to warnings, not ever upgraded from a lower level to warnings

Fixes #47002

Use the correct grouping for the not null assertion

Fixes #46701

Fixes #46590

Fixes #45785