assimp: boost isn't required.

Closes #34371.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
assimp: general cleanup.
assimp: add 3.1.1 bottle.
juju 1.20.12.

Closes #34374.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
juju: update 1.20.12 bottle.
translate-toolkit: fixing python

Closes #34356.

Also, they’ve moved to Github it seems, so the download link has
shuffled. Otherwise, a complete Python reformat to match Tim’s new
guidelines.

Closes #34360.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
translate-toolkit: add 1.12.0 bottle.
unrar 5.2.2

Closes #34385.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
unrar: add 5.2.2 bottle.