Move some functions to gitrepo package (#35543)

Refactor Git command functions to use WithXXX methods instead of
exposing RunOpts.
This change simplifies reuse across gitrepo and improves consistency,
encapsulation, and maintainability of command options.

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modules/git/pipeline/namerev.go

@@ -22,12 +22,12 @@ func NameRevStdin(ctx context.Context, shasToNameReader *io.PipeReader, nameRevS
 
 	stderr := new(bytes.Buffer)
 	var errbuf strings.Builder
-	if err := gitcmd.NewCommand("name-rev", "--stdin", "--name-only", "--always").Run(ctx, &gitcmd.RunOpts{
-		Dir:    tmpBasePath,
-		Stdout: nameRevStdinWriter,
-		Stdin:  shasToNameReader,
-		Stderr: stderr,
-	}); err != nil {
+	if err := gitcmd.NewCommand("name-rev", "--stdin", "--name-only", "--always").
+		WithDir(tmpBasePath).
+		WithStdin(shasToNameReader).
+		WithStdout(nameRevStdinWriter).
+		WithStderr(stderr).
+		Run(ctx); err != nil {
 		_ = shasToNameReader.CloseWithError(fmt.Errorf("git name-rev [%s]: %w - %s", tmpBasePath, err, errbuf.String()))
 	}
 }