Clean up log messages (#30313)

`log.Xxx("%v")` is not ideal, this PR adds necessary context messages.
Remove some unnecessary logs.

Co-authored-by: Giteabot <teabot@gitea.io>

services/repository/files/cherry_pick.go

@@ -28,7 +28,7 @@ func CherryPick(ctx context.Context, repo *repo_model.Repository, doer *user_mod
 
 	t, err := NewTemporaryUploadRepository(ctx, repo)
 	if err != nil {
-		log.Error("%v", err)
+		log.Error("NewTemporaryUploadRepository failed: %v", err)
 	}
 	defer t.Close()
 	if err := t.Clone(opts.OldBranch, false); err != nil {

services/repository/files/patch.go

@@ -111,7 +111,7 @@ func ApplyDiffPatch(ctx context.Context, repo *repo_model.Repository, doer *user
 
 	t, err := NewTemporaryUploadRepository(ctx, repo)
 	if err != nil {
-		log.Error("%v", err)
+		log.Error("NewTemporaryUploadRepository failed: %v", err)
 	}
 	defer t.Close()
 	if err := t.Clone(opts.OldBranch, true); err != nil {

services/repository/files/update.go

@@ -143,7 +143,7 @@ func ChangeRepoFiles(ctx context.Context, repo *repo_model.Repository, doer *use
 
 	t, err := NewTemporaryUploadRepository(ctx, repo)
 	if err != nil {
-		log.Error("%v", err)
+		log.Error("NewTemporaryUploadRepository failed: %v", err)
 	}
 	defer t.Close()
 	hasOldBranch := true