[mlir][ods] Assert on static getAttrName methods

This patch makes ODS insert an assert when calling static `get*AttrName`
methods with a `OperationName` that the name is the same as the op's.
This prevents accidentally passing the wrong kind of name and getting an
erroneous attribute name.

Reviewed By: rriddle

Differential Revision: https://reviews.llvm.org/D135698