* Writing attribute to metadata

* Reading attribute in PE symbols

* Added more tests for lambdas, delegates, and other types

* Use ReadOnlyAttribute instead

* Fix build break

* Fix Failed Tests

* Enable back disabled tests

* Fix more tests

* Ban usage of ReadOnlyAttribute in source

* Rename System.Runtime.InteropServices.ReadOnlyAttribute to System.Runtime.CompilerServices.ReadOnlyAttribute

* Clean up

* Address CR comments

* More PR feedback