The custom assembly resolution is no longer needed in our MSBuild task
now that it has no project references and multi-targets to the important
runtimes.

This logic has actually been broken for some time now. More recent
changes revealed it's just not necessary.

Removes the fixed MSBuild version and moves our floating MSBuild to 15.1
RTM

closes #31479

Simplify SetForegroundWindow

Refactor change namespace service

Revert #31132

Add a compat overload for IntelliCode

Remove legacy RPS test from opt-prof run

Fix a bug in the syntax generator with VB constructors and attributes.

Project document ordering

* Mark eng\docker\mono.sh executable

* Report error if docker build fails.

Add ability to extract interface to same file. New interfaces will be extracted above code.

* New UI with radio button
* Refactor Abstract service to be less dependent on language implementations
* Always format and simplify code being modified during the refactor
* Move a lot of the work to be async
* Added tests

Add new refactoring feature to wrap/indent/align lists of parameters/arguments

* make sure we release lock when solution is closed by setting working folder to null

* verify solution close removing working folder

Fix couple of bugs in unused private members analyzer

* fixed re-enterance bug in async operation listener.

basically we are calling SetResult inside of a lock and since we used regular lock which allows re-enterance, we sometimes ran arbitary code under lock which re-entered async operation listener and mess everything up.

changed to non re-enterance lock so that it explicitly throws if re-enterance happens.

and make sure call SetResult from other thread (out side of the lock).

* use new task creation option

* renamed methods to have NoLock

* updated comment

Fix double negation of integral `MinValue`s

Fix classification for comments after "#pragma warning" directives

Add missing format for same file extraction. It was removed from GetSolutionWithOriginalTypeUpdatedAsync

More Test Hook Fixes

Fix AddImport to not error on awaited extension methods

Use release bootstrap compiler