models: break out of loops (#12159)

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

models/repo_sign.go

 		return false, "", &ErrWontSign{noKey}
 	}
 
+Loop:
 	for _, rule := range rules {
 		switch rule {
 		case never:
 			return false, "", &ErrWontSign{never}
 		case always:
-			break
+			break Loop
 		case pubkey:
 			keys, err := ListGPGKeys(u.ID, ListOptions{})
 			if err != nil {
 		return false, "", &ErrWontSign{noKey}
 	}
 
+Loop:
 	for _, rule := range rules {
 		switch rule {
 		case never:
 			return false, "", &ErrWontSign{never}
 		case always:
-			break
+			break Loop
 		case pubkey:
 			keys, err := ListGPGKeys(u.ID, ListOptions{})
 			if err != nil {
 		return false, "", &ErrWontSign{noKey}
 	}
 
+Loop:
 	for _, rule := range rules {
 		switch rule {
 		case never:
 			return false, "", &ErrWontSign{never}
 		case always:
-			break
+			break Loop
 		case pubkey:
 			keys, err := ListGPGKeys(u.ID, ListOptions{})
 			if err != nil {