* Use Arcade testing targets

* Skip CodeStyle tests on Mono

* Include net472 in test target frameworks for Mono

* Remove incorrect file existence check.

* Update ADO integration test yaml

This change simplifies our data flow analysis by removing an obsolete subclass and renaming some of the components to standardized names used in the literature on lattice data flow analysis.

Fixes #23207 

Fix build correctnes leg

Update our status badges

* some code clean up and added some code instruments to make perf investigation easier

* changed lambda to local function and addressed feedback

Update the naming of our Azure YAML files

Address pending issues for unused value code fixer

Switch calls to GetProjectState if we don't need the snapshot

Originally created when everything was VSTS. This gets us back inline
with the new branding.

Include Microsoft.VisualStudio.CodingConventions in the Code Style packages

* Classify malformed XML Doc comments as XmlDocCommentText

* Added test for malformed xml doc comment classification

Goodbye Jenkins

* Updating classification for discard designation and underscore tokens to be Keywords rather than Identifiers.

* Removing underscore from the IsKeywordKind check, since it is covered by isContextualKeyword

* Reverting change to SyntaxFacts and moving discard check back to ClassificationHelpers.

* Reverting all changes to SyntaxFacts.

* Add a comment clarifying how _ is classified.

Always use procdump on test timeout

Use the new IBlankLineIndentationService in the string-splitting feature.

Improve test performance by disposing of the workspace

make sure to VS and OOP to use same file to get mvid of analyzer file reference when creating checksum for both VS and OOP (#31438)

the problem is that the OOP always used the actual file that got used for analyzer (in other words, shadow copied file in VS), but VS used original file to get MVID.

based on shadow copying logic, 2 (with same assembly identity) might actually be 2 different files by sharing a shadow copied file between 2 original files with same assembly identitis causing MVID to be different.

this make sure all use same file for MVID so that regardless of host implementation of analyzer loader (who is the actual thing that control what file will be used to get analyzers), we get consistent MVID

Fix ApplyPartialNgenOptimization property name

This changes the remaining Jenkins badges on the README to point to our
new Azure DevOps badges instead. Also cleans up a few comments on the
switch over PR

Move VS integration tests to Azure Dev Ops

These methods are called any time we add a new project and we have a
new output path; this was causing us to realize a Project object for
every project in the solution, which was O(n^2) during solution load.
This was adding a few hundred milliseconds of overhead in the immutable
data structure, which in this particular case we don't need.

Fixes dotnet/roslyn#31306.

Fix up VisualStudioWorkspace.GetFileCodeModel

Azure support for VS integration tests

This changes RunTests to always use procdump when tests timeout.

Previously there was a single option, procdumppath, which controlled
both monitoring xunit processes with procdump and using procdump on time
out. The former causes stability issues at times with test execution and
has to be disabled in a couple of places (spanish and integration
tests). The latter has no stability issues and hence should always be
used.

Related issue: https://github.com/dotnet/roslyn/issues/25145
This PR add the function to VS and let use to pull members up via quick action

Address feedback from https://github.com/dotnet/roslyn/commit/dacca3d1bd6509935e4d01cf3f0e242075c217f2#r31467643

// "x is int _" => "x is int"

Changed GetContextualKeywordKinds(), always return all contextual keywords

Address feedback from https://github.com/dotnet/roslyn/commit/dacca3d1bd6509935e4d01cf3f0e242075c217f2#r31467539

// "M(out var _)" => "M(out _)"
// "M(out int _)" => "M(out _)"

Add unit test for https://github.com/dotnet/roslyn/commit/dacca3d1bd6509935e4d01cf3f0e242075c217f2#r31465616 - unable to repro it locally

Fix code fixer for replacement inside a switch section. Addresses feedback from https://github.com/dotnet/roslyn/pull/31387/files#r236553196.