Motivation for changes:

Series plugin support season pack for identify_by ep and Internal parsing have partial support even guessit more capabilities and support season packs in more cases than internal guessit, so this PR add support of pack for guessit in flexget

Detailed changes:

• Update guessit parser to support series pack
• Fix check by country that was rejecting valid cases like Dark (2022)

Addressed issues:

• N/A

Implemented feature requests:

• N/A

Config usage if relevant (new plugin or updated schema):

    discover:
      what:
        - next_series_seasons:
            from_start: yes
            backfill: yes
      from:
        - 1337x:
            order_by: seeders
    configure_series:
      from:
        entry_list: watchlist_series
      settings:
        identified_by: ep
        tracking: backfill
        exact: yes
        season_packs: only

Log and/or tests output (preferably both):

paste output here