Fix release cleanup for providers (apache#58082)

* Fix release cleanup for providers

* Apply suggestion from @potiuk

Author: potiuk

dev/breeze/src/airflow_breeze/commands/release_management_commands.py

@@ -1966,6 +1966,8 @@ def clean_old_provider_artifacts(
         os.chdir(directory)
 
         for file in glob.glob(f"*{suffix}"):
+            if "-source" in file:
+                continue
             versioned_file = split_version_and_suffix(file, suffix)
             package_types_dicts[versioned_file.type].append(versioned_file)