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)

models/repo/repo_location_test.go

@@ -14,7 +14,6 @@ import (
 
 func TestRepository_GitRepo(t *testing.T) {
 	assert.NoError(t, unittest.PrepareTestDatabase())
-
 	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})
 
 	assert.Equal(t, "user2/repo1.git", repo_model.CodeRepoByName(repo.OwnerName, repo.Name).GitRepoLocation())