1. Fix test issues
2. Remove IHasDynamicArgumentsExpression interface and move the Arguments property from it to individual IDynamicXXXExpression nodes.
3. Adjust the extension methods for GetArgumentName and GetArgumentRefKind accordingly.

1) Use IDynamicInvocationExpression for VB late bound invocation and C# dynamic invocation.
2) Use IDynamicIndexerAccessExpression for C# dynamic indexer access; not used in VB.
3) Remove IDynamicObjectCreationExpression.MemberName property.
4) Add extension methods on IHasDynamicArgumentExpression to get optional argument name and ref kind for an argument at a given index.

Fixes #8882

Fixes #20114 and #20122

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

Moved IFixedStatement internal until we have time to review the API. NoneOperation will be used in its place.

This implements a bunch of changes to the IOperation representation for binary operator, unary operator and increment expressions.

1. #8834: Simplify `UnaryOperatorKind` to only contain the operator kind values instead of a matrix of operator and operand kinds.
2. #8835: Simplify `BinaryOperatorKind` in similar manner as above.
3. #8825: Add `IUnaryOperatorExpression.IsChecked` flag. Cyrus has already added the `IUnaryOperatorExpression.IsLifted` flag.
4. #8846: Add `IBinaryOperatorExpression.IsChecked` and `IBinaryOperatorExpression.IsCompareText` flags Cyrus has already added the `IBinaryOperatorExpression.IsLifted` flag.
5. #21283: Add `IIncrementExpression.IsDecrement` and `IIncrementExpression.IsPostfix` flags and remove PostFix/Prefix Increment/Decrement from `UnaryOperatorKind` enum.

This change also fixes #8848 and #8843 as the matrix operation kind enums no longer exist.