* 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

Fixes #18348

Improve method type argument inference around tuples and address backwards compatibility break. (#22295)

Fixes #20583.

Fixes #22265

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

Address feedback from the design meeting and only expose the top level ITranslatedQueryExpression IOperation for v1.

We longer expose any special IOperation nodes for query clauses/operators, but just the underlying query plan. For v2, we hope to enhance the APIs to expose a richer query API.

Another design decision was to rewrite VB query lambdas into regular lambda, so we have parity between C# and VB operation trees.
This change refactors the VB query lambda local rewriting code to be consumed from the VB operation factory for the same.
The rewriter introduces a large number of DAGs, and we handle them in the operation factory rewriter by cloning the duplicate bound nodes in the lowered tree.

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

Fixes #8882

1. Add IsChecked flag for IIncrementExpression and ICompoundAssignmentExpression
2. Add back VB specific binary operator kinds
3. Add more unit tests and fix baselines of existing tests

Updated VB to handle BoundUserConversion correctly, get conversionkind directly from the BoundNodes.

Implements the proposal discussed in https://github.com/dotnet/roslyn/issues/17838#issuecomment-318125250.

1. We will have an `IQueryExpression` representing the topmost query expression.
2. This will point to the last query clause (`IQueryClause`) or continuation (`IQueryContinuation`) in the unrolled lowered bound tree - we are not got going to reverse the tree to match source.
3. `IQueryClause` will have a `QueryClauseKind` field indicating the type of query clause, which should match the syntax/language specification query clause/operator kinds.

* 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.