Generalize the pass hierarchy by adding a general OpPass<PassT, OpT>.

Generalize the pass hierarchy by adding a general OpPass<PassT, OpT>.

This pass class generalizes the current functionality between FunctionPass and ModulePass, and allows for operating on any operation type. The pass manager currently only supports OpPasses operating on FuncOp and ModuleOp, but this restriction will be relaxed in follow-up changes. A utility class OpPassBase<OpT> allows for generically referring to operation specific passes: e.g. FunctionPassBase == OpPassBase<FuncOp>.

PiperOrigin-RevId: 266442239