* Fix nullable annotations for ValueSource

* Refactor WeakValueSource

* Replace OptionalValueSource<T> with ValueSource<Optional<T>>

Disabled by default analyzers, which are enabled via .editorconfig are not executing in the IDE diagnostic service. This is due to us skipping live analysis for analyzers disabled by default OR disabled via compilation options as a performance optimization. However, this check is no longer correct as analyzers can be enabled/disabled for individual documents through .editorconfig files. So we no longer perform this check and pessimistically assume analyzer is not suppressed and let the core analyzer driver in the compiler layer handle skipping redundant analysis callbacks.

* Refactor tuple implementation

* Tweaks

* Address PR feedback

* Pass tuple data in constructors

* Address more feedback

* Tweak comparison

* Restore constructWithTypeParameters flag to avoid overflow

* Assert that tuple parameter matches TupleUnderlyingType somewhat

* Rename to TupleData. Address some IDE feedback

* Remaining TODO2's

* Fix last IDE test!

* Factor array comparison

* Tweak WithTupleData and EqualsIgnoringTupleUnderlyingType

* Expand a test

* Remove duplicate line

* Remove an EE test for badly formed ValueTuple type

* PR feedback from Neal

* Restore an IDE test without ValueTuple

* Rename constants

* Restore formatting

Fixed #40374, introduce local can introduce local in wrong place with local functions + added applicable tests

Local function control flow analysis should now use the analysis walker from the base
class instead of defining its own.

Fixes #39946