[sancov] Adopt createUnlikelyBranchWeights in CreateGateBranch#117398

thetruestblue wants to merge 2 commits intollvm:mainllvm/llvm-project:mainfrom

thetruestblue:thetruestblue/convert-weightsthetruestblue/llvm-project:thetruestblue/convert-weightsCopy head branch name to clipboard