Rename holding_bass

BUR #25757 has been approved by @nonamethanks.

rename holding_bass -> holding_bass_guitar
create implication holding_bass_guitar -> holding_instrument
create implication holding_bass_guitar -> bass_guitar
deprecate holding_bass

When a character is holding a bass_guitar
Tag playing_bass instead if they're performing.

The wiki says so. Rename for more intuitive usage and findability.

The problem with the current tag naming is - there are also stuff like bass drum, bass flute, bass clarinet, bass trombone or even bass (fish).
Related: forum #276492

There's also playing bass.

BUR #26045 is pending approval.

rename playing_bass -> playing_bass_guitar
create implication playing_bass_guitar -> playing_instrument

nonamethanks said:
There's also playing bass.

As suggested. For intuitiveness and consistency with the first option.

The bulk update request #25757 (forum #278979) has been approved by @nonamethanks.