Support GetDeclaredSymbol on ForeachStatementSyntax and add tests for…

* Report rude edits when updating method containing switch expression.

Fix stackalloc rude edits.

* Updating modifiers of local functions

* await foreach, await using

* Improve error message

* Distinguish async foreach/using from synchronous in error messages

* Using declaration

* Report rude edit when editing using statement/declaration around non-leaf AS

* Rude edits for switch with patterns

* Fix VB issues with active statements in nested single-line functions and when updating iterators

* Update comment

* Fix duplicate rude edit

* Fix region tracking for regions with local functions

Fixes #37427

* Add to test pre review comment.

Update code style analyzer

Merge NullableAnnotation.NotApplicable and Disabled to None, and rename NullableFlowState.NotApplicable to None for consistency

Add initial GetDeclaredSymbol support for inferred VariableDeclaratorSyntax and SingleVariableDesignationSyntax nodes

Split liveshare handlers

Merge NullableAnnotation.NotApplicable and Disabled to None, and rename NullableFlowState.NotApplicable to None for consistency.

Use AnalyzerConfigOptionsProvider when available

Use the SnapshotManager to store the variable types as it was already doing this, and handle nested scopes correctly.

Add GetDeclaredSymbol support for nullability in variable declarations. Not handled are linq or foreach iteration variable declarations.

Implement Quick Info styles

Fixes #36091

Analyzer driver performance fixes for IDE open file analysis

Use NullableAnnotation.NotAnnotated always for value type annotations in the public API.

Previously, the annotation was NotAnnotated if the type reference was from source and Disabled if the type reference was from metadata.

Fixes #34412

Fixes #37310
Fixes #37279

IDE0066 code fix adds parentheses when needed

This should allow us to query the azure event API to figure out if a particular run failed because of failure to build or test failure. This should help us categorize the causes of CI flakiness and drive it down.

React to Live Share Language Services API Changes

Remove data flow analysis from convert foreach to for refactoring

If it's written to a warning annotation is displayed in the refactoring window to warn that semantics may change.