[MLIR] Add support for defining and using Op specific analysis
- Add variants of getAnalysis() and friends that operate on a specific derived
operation types.
- Add OpPassManager::getAnalysis() to always call the base getAnalysis() with OpT.
- With this, an OperationPass can call getAnalysis<> using an analysis type that
is generic (works on Operation *) or specific to the OpT for the pass. Anything
else will fail to compile.
- Extend AnalysisManager unit test to test this, and add a new PassManager unit
test to test this functionality in the context of an OperationPass.
Differential Revision: https://reviews.llvm.org/D84897