Fix race with boosting OOP priority.  Also, ensure FindRef calls are boosted.

Force load projects that failed design time builds, not ones that opt out of LSL

Remove strong reference to AnalyzerOptions in the analyzer manager ex…

Track down NuGet cache corruption

Revert "allow waiters to be consumed from internal VS tests"

Refactor tests

Add a unit test to ensure that analyzer execution does not leak solution instances from preview workspace.

This change should help us pin down why we are seeing NuGet cache
corruption issues in our Jenkins job.  It adds a check to three places
in our script:

- Start
- Post restore
- End

Depending on when this check fails it should give us a better picture of
where the corruption is occuring.

https://github.com/dotnet/roslyn/issues/19882

Hack around PublicAPI item group support in the new project system

Move Roslyn assemblies to consume newer OptimizationData

This is a workaround for dotnet/project-system#2160 where
AdditionalFileItemNames isn't quite behaving correctly with the IDE.
This can be reverted once that bug is fixed.

This reverts commit 8a1ca479 and moves
publish earlier in the build pipeline (before signing) to prevent
published binaries from overwriting already built and signed binaries.

Fixes #20065

This should likely fix an RPS regression (VSO 440011) related to additional jitting of Roslyn assemblies.

The solution build manager will handle the opted out ones, but not the failed design time build ones.

Fixes #19407.

Fix incorrectly serialized OOP parameters. Also, reenabled all OOP tests.

Don't try to offer to generate default constructors for enums.

Allow running on newer Visual Studio 2017 versions

Move to editor IErrorTag API

Force load project were we don't have command line args in DPL

Make VSI Lightbulb failures more diagnosable

Add option to disable OOP diagnostics during testing.  They don't currently work with the CodeAction testing infrastructure.

Don't try to create a deferred project for a project reference if the design time build
failed, or the project system opted out of deferred projects for this project.

It used to switch on Tag type to determine which tagger to use, now the tagger type is directly used as the type parameter.

We simply have to produce IErrorTag with with "hinted squiggle" type and the editor will make tooltips and the adornment "just work"

Closes #18320.