…roviderCache

…tProvider

…vider in a test constructor

…ch test

… teardown

Closes #25560

This addresses a code review feedback point from #25558.

In the case the CLI was previously downloaded but not yet on `%PATH%` we
need to manually add it there. Not doing it leads to cases where MSBuild
can't find the proper SDK and as a result failing the build.

closes #25649

…or local functions, and exposed both to IOperation consumers.

…n specified in review.

The static constructor of SQLitePersistentStorage would throw an
exception, which would then get logged by the exception logger.

This changes the following logic:

* The database used to be deleted if e_sqlite was not found.
* The sqlite persistent storage is not used if e_sqlite is not found.
* The database ownership lock is released if any exceptions happen
while trying to instantiate the storage.

Fixes #24042

Extra story:
There is a architectures of e_sqlite not existing for some platforms,
i.e. ARM64. Therefore, in MonoDevelop, it would throw a
TypeInitializationException on trying to initialize the SQLitePersistentStorage.

In this case, what would happen is:
* The persistent storage service would create the lock file.
* It would throw in the static constructor, without having passed
ownership
* Thus, the lock file is created by the service, not held by anyone
specifically
* The exception wasn't accounted for, so the storage file would be
deleted
* We now have a lock file present and no storage created
* Roslyn will keep trying to create the persistent storage on every
subsequent try, ending up in a performance issue caused by continuous
IO on trying to get ownership on the lock file, but it can't take it
because nobody released the old lock

Therefore, shortcircuiting and disabling persistent storage in case the
lib is not found is better.

See #25814

See #19816

Fix signing of swix project output

The implementations of ISuggestedAction use threading assertions instead of
automatic transition to the correct thread, placing the burden of correct
thread selection on the caller, TextViewWindow_InProc. This change switches
to the vs-threading approach for maintaining thread affinity, which has two
parts:

1. When entering thread-affinitized code, switch to the correct thread
2. Avoid using ConfigureAwait(false) to lose the required affinity

The entire file relies on the default behavior of ConfigureAwait, which is
the normal coding practice in asynchronous code following vs-threading
patterns.

Make escape analysis over unexpected nodes to return conservative results

The getter is 'Enabled' and the setter is 'SetEnabled_OnlyUseExportProviderAttributeCanCall'.

…een tests

Closes #25805

This change ensures that all work added to the work queue after disconnection is
immediately cancelled.

While it doesn't make sense to still be requesting foreground actions after
cancellation is requested, tracking down all callers of
IForegroundNotificationService to ensure the proper checks are in place can be
tedious. This change treats IForegroundNotificationService as the gatekeeper
for scheduling asynchronous operations, and proactively cancels operations if
requested before adding them to the work queue.

Isolate tests

Implements targets that calculate PathMap from SourceRoots and provide extension point for Source Link generator