[MLGO] Fix InlineAdvisor and ModelUnderTrainingRunner after hasValue removal

[aidengrossman]

Summary

Recentlyin 4b6b248, llvm::Optional's hasValue method was removed as
described in
https://discourse.llvm.org/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor
This breaks InlineAdvisor and ModelUnderTrainingRunner. This patch fixes
them by changing the method to has_value, which hasValue was evaluating
to before.

[aidengrossman]

The MLGO builders building dev configurations are currently broken due to this. I'm going to land this patch since it's small and I'm reasonably confident it is correct, just pushing the diff because I'm familiar with the workflow and we can rollback to here in case something does go awry.

llvm/lib/Analysis/InlineAdvisor.cpp

case InliningAdvisorMode::Default:
     }
     break;
   case InliningAdvisorMode::Development:
 #ifdef LLVM_HAVE_TF_API
     LLVM_DEBUG(dbgs() << "Using development-mode inliner policy.\n");
     Advisor =
         llvm::getDevelopmentModeAdvisor(M, MAM, [&FAM, Params](CallBase &CB) {
           auto OIC = getDefaultInlineAdvice(CB, FAM, Params);
-          return OIC.hasValue();
+          return OIC.has_value();
         });
 #endif
     break;
   case InliningAdvisorMode::Release:
 #ifdef LLVM_HAVE_TF_AOT
     LLVM_DEBUG(dbgs() << "Using release-mode inliner policy.\n");
     Advisor = llvm::getReleaseModeAdvisor(M, MAM);
 #endif

llvm/lib/Analysis/ModelUnderTrainingRunner.cpp

ModelUnderTrainingRunner::ModelUnderTrainingRunner(
 
   for (size_t I = 0, E = InputSpecs.size(); I < E; ++I) {
     setUpBufferForTensor(I, InputSpecs[I], Evaluator->getUntypedInput(I));
   }
 }
 
 void *ModelUnderTrainingRunner::evaluateUntyped() {
   LastEvaluationResult = Evaluator->evaluate();
-  if (!LastEvaluationResult.hasValue()) {
+  if (!LastEvaluationResult.has_value()) {
     Ctx.emitError("Error evaluating model.");
     return nullptr;
   }
   return LastEvaluationResult->getUntypedTensorValue(0);
 }
 
 std::unique_ptr<ModelUnderTrainingRunner>
 ModelUnderTrainingRunner::createAndEnsureValid(