Implement DELETE's for UPDATE's to metadata only ingestion

[lewismc]

For scenarios where a metadata entry is REMOVED, we need to ensure that metadata table entry is also DELETE'd.
https://github.com/tagbase/tagbase-server/blob/main/tagbase_server/tagbase_server/utils/processing_utils.py#L325C5-L336

[renato2099]

hey @lewismc , I put up a PR for this here #304