* EnC support of static local functions

* code review feedback

* StatementMatchingTests

* StatementEditingTests

* ActiveStatementTests

* tests with await

* code review feedback

* Emit tests

* Report rude edits for unsupported DIM operations

* Allow EnC tests to specify TFMs to build against

* EnC: test against netcoreapp30

* Test fixes

* Fix merge

* Top-level types enumeration refactoring

* Simplify DefinitionMap

* Include namespaces in synthesized definition map

* Add SynthesizedNamespaceSymbol

* Embedded Attributes

* Test synthesized attributes

* Clean up EnC tests

* Clean up symbol matcher tests

* Ref readonly return type, in parameter symbol matching tests

* Enable using ref readonly returns, in parameters, ref structs during debugging

* More tests

* ReadOnly struct members

* Fix langauge version mismatch

* Merge fix ups

* Feedback, skip tests

* Add errors for ref-readonly signatures, readonly structs, and ref structs

* EE now working with ref-readonly

* Fix failing tests

* PR Comments

* Rename Foo to Goo

* Rename ifoo to igoo

* Add back BOMs

Refactor tests

Avoid calling GetDiagnostics on compilation during EnC analysis

* Fixes rude error reporting for lifted implicit value parameters

* Allow null

Manually inspected the WorkItem values and added the appropriate URL.

These tests were all using WpfFact, but not actually doing anything
that required either WPF or an STA thread. We plan to enable
parallelization of Facts (but not WpfFacts), and this ensures we can
parallelize as many tests as possible.

Fix #2556 and internal bug 1198941

Fix #3894. Note that VB porting will be followed.

Fix #1853 and #2657

Fix breakpoint handling and EnC of queries containing Select and GroupBy clauses that don't translate their select/group-by expression to lambda