* Adding cobyrc file for testing

* Adding isImplicit info to ioperation tests

* Adding Language name to the test dumper

* Formatting change to test dumper

* Removing cobyrc file

* Fixing more tests

* Resolving conflicts

* Moving the language to assert check

* Resolving conflicts

* Reacting to merge conflict

I also found that Range and Relational case clause have no tests in VB. Additionally, I also marked all OperationAnalyzerTests with CompilerTrait attribute so they don't get skipped in local trait based testing.
Fixes #22129

Remove IsDeclaration: False from ILocalReferenceExpression and IFieldReferenceExpression. Adding back is tracked by #21798

* Rename Foo to Goo

* Rename ifoo to igoo

* Add back BOMs

* Changing the dumper to get of calling base.Visit when not needed

* Getting rid of cobyrc file

* Adding copyright header

* fixing merge conflict

* Change the IOperation unit test dump format for child nodes

* fixing the newly merged tests.

Fixes https://github.com/dotnet/roslyn/issues/20312

The synthesized variable used for storing the value of Select Case should be long-lived. (changeset 1348097)

Renamed VB's CaseElse-, CaseValue-, CaseRelational-, and CaseRangeClause nodes/kinds to match .NET conventions for derived types - <Specialization>BaseName instead of their current BaseFirstWord<Specialization>BaseLastWord pattern. (changeset 1264911)