Run gopls modernize on codebase (#34751)

Recent modernize fixes:
https://github.com/golang/tools/commits/master/gopls/internal/analysis/modernize

modules/git/repo_commit.go

@@ -547,11 +547,11 @@ func (repo *Repository) GetCommitBranchStart(env []string, branch, endCommitID s
 		return "", runErr
 	}
 
-	parts := bytes.Split(bytes.TrimSpace(stdout), []byte{'\n'})
+	parts := bytes.SplitSeq(bytes.TrimSpace(stdout), []byte{'\n'})
 
 	// check the commits one by one until we find a commit contained by another branch
 	// and we think this commit is the divergence point
-	for _, commitID := range parts {
+	for commitID := range parts {
 		branches, err := repo.getBranches(env, string(commitID), 2)
 		if err != nil {
 			return "", err