Add filter and action to EPO’s fetch_all_lookuptables() method

sebastian.troester@draw-up.com

#118984

Dear Themecomplete Team,
To be able to customize the fetch_all_lookuptables() method in the THEMECOMPLETE_Extra_Product_Options class, I would love to see both an action and a filter being introduced:

• An action right at the beginning of this method like "tm_epo_before_lookuptable_fetch" to run some independent code. There could be even an "after fetch" filter for completeness.
• A filter that takes the $meta_query_args as an input, in order to adjust the metadata query. This is helpful in case you want to filter lookup tables for some more (custom) criteria than just "lookuptable_meta" exists

Thank you!