Improve diagnostics for MsbuildWorkspace

Enable more OOP FAR tests.

Use document options instead of workspace ones

made service hub to log better watson

move more service to new JsonConverter

Move to new VS Build: 26201.00

Share 'generated-code' logic between the compiler and IDE.

Merge master into post-dev15

# Conflicts:
#	src/Compilers/CSharp/Test/Semantic/Semantics/OutVarTests.cs
#	src/EditorFeatures/TestUtilities/Remote/InProcRemostHostClient.cs
#	src/VisualStudio/Core/Next/Remote/JsonRpcClient.cs
#	src/VisualStudio/Core/Next/Remote/ServiceHubRemoteHostClient.cs

Remove code that is no longer necessary now that a compiler bug has been fixed.

Filter out light bulb actions with duplicate titles.
Fixes #16024

Run NavigateTo unit tests in OOP as well.

Run FindRefs unit tests in OOP as well.

Allow build output to be redirected externally

Fix issue with inline-formatting changing indentation of multi-line constructs
Fixes #16198

Add ref-support for generating fields/properties.

Fix issue that prevented us from offering rename-file options.
Fixes #16284

Add support for generating methods that return-by-ref.
Fixes #16398

Pass along the value that was unexpected when we encounter one.

Report use-site diagnostics if System.ValueTuple base type is an error type

Properly generate type syntax for tuples with less than arity-2.
Fixes #16793