Split `ISyntaxKindsService` into two parts:

1. `ISyntaxKinds`: Pure data query interface, which already exists in CompilerExtensions shared project and can be used by analyzers.
2. `ISyntaxKindsService`: The `ILangaugeService` implementation of `ISyntaxKinds`

Above split ensures that we can move the `ISyntaxKindsService` language service implementation down to the WorkspaceExtensions project, which in turn ensures that `GetLanguageService<ISyntaxKindsService>` will always succeed in our entire code base. This is currently not true in CodeStyle fixes layer due to the fact that the language service implementation is defined in Workspaces.csproj

Update src/Features/Core/Portable/SimplifyInterpolation/AbstractSimplifyInterpolationDiagnosticAnalyzer.cs

Fixes #41573

* CodeStyle+Workspaces -> CompilerExtensions
* CodeStyle+Features -> Analyzers
* CodeStyleFixes+Workspaces -> WorkspaceExtensions
* CodeStyleFixes+Features -> CodeFixes

* Clean up string resources, use Arcade resx generator

* CodeLens resources


* Use NET20 instead of NETFX20

SyntaxGEnerator will be updated to produce tehse nodes, but in a more abstract manner (i.e. without tokens/trivia).
This is not what this feature wants, so we're hardcoding the behavior it needs directly in the feature itself.