Move RemoveUnnecessaryValuesAndParameters analyzer/fixer/tests to shared layer

Classify escape characters in char literals

Oops forgot to checkin the files that were removed when moving couple of language services to shared layer

Extract out some internal SyntaxGenerator methods into a separate language service in shared layer so it can be used by our code fixes. These methods can eventually be removed when we expose these as public APIs on SyntaxGenerator and CodeStyle layer can move to new CodeAnalysis package reference consume these new APIs.

* Add Razor shims to ExternalAccess.Razor.

- This is the first step to removing IVT to Razor assemblies from core Roslyn assemblies. Once Razor is able to consume these changes and move to the new APIs we can entirely remove the IVTs from Roslyn assemblies.
- Brought Razor's `IDynamicFileInfoProvider` implementation over to the ExternalAccess.Razor package and built a new concept (`IRazorDocumentContainer`) that allows Razor to pass it just enough information about the document to Roslyn for it to "do the right thing".

dotnet/aspnetcore#19551

* Refactored Razor.ExternalAccess to leave more logic in Razor.

- Now `IDynamicFileInfoProvider` is shimmed and the core-logic exists in the Razor repo.
- Added the ExternalAccess.Razor piece to the Roslyn deployment to ensure our `IDynamicFileInfoProvider` wrapper can be found by MEF components. In the case that the Razor workload is not available we allow a `null` Razor dynamic file implementation.
- Updated the ExternalAccess.Razor project to be netstandard2.0 instead of net472 so it vibes better with the Razor repo.

dotnet/aspnetcore#19551

* Turn nullable reference types on for ExternalAccess.Razor and make the DynamicFileInfoProvider not load Razor assemblies in non-Razor scenarios.

Disable test on CoreCLR

Only simplify interpolations when the alignment value is constant.

Turn nullable reference types on for ExternalAccess.Razor and make the DynamicFileInfoProvider not load Razor assemblies in non-Razor scenarios.

* Update dependencies from https://github.com/dotnet/arcade build 20200309.2

- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.20159.2

* Update dependencies from https://github.com/dotnet/arcade build 20200310.4

- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.20160.4

* Update dependencies from https://github.com/dotnet/arcade build 20200311.5

- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.20161.5

* Update dependencies from https://github.com/dotnet/arcade build 20200312.3

- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.20162.3
Co-authored-by: Ndotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

The CompareAllBytesEmitted tests need to be disabled on CoreCLR due to
a flakiness issue.

Add VSTypeScriptEditorInlineRenameService + associated classes

Don't generate protected constructors in sealed classes

Fixing spacing when converting code to pattern matching

Add back support for non MEF imported completion providers

Detect a new pattern for when a ??= expression can be suggested.

- Now `IDynamicFileInfoProvider` is shimmed and the core-logic exists in the Razor repo.
- Added the ExternalAccess.Razor piece to the Roslyn deployment to ensure our `IDynamicFileInfoProvider` wrapper can be found by MEF components. In the case that the Razor workload is not available we allow a `null` Razor dynamic file implementation.
- Updated the ExternalAccess.Razor project to be netstandard2.0 instead of net472 so it vibes better with the Razor repo.

dotnet/aspnetcore#19551

Ensure that hidden analyzer escalated to non-hidden severity through …

Restrict the locations we show some refactorings in

Fix indentation when converting to simple-using-statements.

* Enable nullable reference types for SymbolExtensions

* Add missing annotation

Port populate switch analzyer and fixer to shared layer

Ensure that hidden analyzer escalated to non-hidden severity through editorconfig setting are executed during Full solution analysis (FSA)

Fixes #42353

Improve determination about which parameters already match in add-param.