[MLIR] Add variadic isa<> for Type, Value, and Attribute

- Also adopt variadic llvm::isa<> in more places.
- Fixes https://bugs.llvm.org/show_bug.cgi?id=46445

Differential Revision: https://reviews.llvm.org/D82769

mlir/lib/Target/LLVMIR/ModuleTranslation.cpp

@@ -778,8 +778,7 @@ LogicalResult ModuleTranslation::convertOneFunction(LLVMFuncOp func) {
 
 LogicalResult ModuleTranslation::checkSupportedModuleOps(Operation *m) {
   for (Operation &o : getModuleBody(m).getOperations())
-    if (!isa<LLVM::LLVMFuncOp>(&o) && !isa<LLVM::GlobalOp>(&o) &&
-        !o.isKnownTerminator())
+    if (!isa<LLVM::LLVMFuncOp, LLVM::GlobalOp>(&o) && !o.isKnownTerminator())
       return o.emitOpError("unsupported module-level operation");
   return success();
 }