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