Refactor (fix) Compilations & Featured In

[NeatoMonster]

Behavior before:

• By default, grab everything where ARTIST == ALBUM ARTIST, ignoring TYPE 2 COMPILATIONS but including TYPE 1 & TYPE 3 isCompilation releases.
• "include_featured_in": true by itself did nothing; it was unchecked.
• "include_unofficial": false is ignored once "include_compilations": true is enabled.
• "include_compilations": true by itself grabbed TYPE 2 releases, as well as TYPE 0 & TYPE 3 FEATURED IN releases.
• "include_compilations": true + "include_featured_in": true together grabbed the above as well as TYPE 1 FEATURED IN releases and TYPE 1 & TYPE 3 COMPILATIONS (isCompilation) releases.

Behavior now:

• By default, grab everything where ARTIST == ALBUM ARTIST, including TYPE 2 and TYPE 1 & TYPE 3 isCompilation.
• "include_unofficial": false is always adhered to.
• "include_compilations": true removes the check for ARTIST == ALBUM ARTIST in compilation releases.
• "include_featured_in": true removes the check for ARTIST == ALBUM ARTIST in non-compilation releases.

Notes:

• Most TYPE 1 compilations are things like "TOP HITS 20XX" or "10'S ROCK" and while most of them are marked isCompilation, not all of them are.
• Two config options that may be useful to implement in the future would be filtering ARTIST == ALBUM ARTIST compilations (include_self_compilations), and TYPE 2 vs isCompilation filtering (unsure how these releases are meant to differ.)

[digitalec]

Thanks for the PR and apologies for the delay in reviewing. I will test this locally to see what additional releases are detected against my existing database.