Reuse local rewriter to derive arguments for IHasArgumentsExpression

LambdaRewriter should only assign proxies from locals in original frame in EE

Fix bug when caret is at the end of a numeric literal

Issue #10428: Formatting of empty loops now respects CSharp spacing options

Enable debug information by default in CSI

Fix bug when caret is at the end of an argument

Fix perf regression in gotodef.

Move DocumentHighlights data types down to the 'Features' layer.

Fix FQN for CodeLens (for test discovery)

Reduce overhead from memory mapped files

Test base

Check for missing hierarchies when mapping to Roslyn projects

Add a common base type of IDE and diagnostics VS performance tests. 

Fixes #19493