refactor: remove Path field from git.Repository (#38552)

The "path" details should be hidden to other packages

By the way, fix a resource leaking in gogit's CommitNodeIndex
(the file was not closed in CacheCommit)

modules/git/repo_ref_gogit.go

@@ -9,16 +9,12 @@ import (
 	"context"
 	"strings"
 
-	"github.com/go-git/go-git/v5"
 	"github.com/go-git/go-git/v5/plumbing"
 )
 
 // GetRefsFiltered returns all references of the repository that matches patterm exactly or starting with.
 func (repo *Repository) GetRefsFiltered(ctx context.Context, pattern string) ([]*Reference, error) {
-	r, err := git.PlainOpen(repo.Path)
-	if err != nil {
-		return nil, err
-	}
+	r := repo.gogitRepo
 
 	refsIter, err := r.References()
 	if err != nil {