[debugger][wasm] Support DebuggerProxyAttribute (#56872)

[debugger][wasm] Support DebuggerProxyAttribute (#56872)

* Implementing debugger proxy

* fix compilation

* Implement debuggerproxy attribute.

* Reusing code for DebuggerProxy method and DebuggerDisplay method.

* Fix unit tests.

* Fixing unit tests that uses List<T>.

* Fix unit tests that uses List.

* Addressing @radical comments.

* Using flags enum as suggested by @lewing.

* Fixing merge.

* Addressing @radical comments.

* Addressing @radical comments.

Co-authored-by: Larry Ewing <lewing@microsoft.com>