big_op: weaken all Absorbing conditions using TCOr and Affine
For all big_op lemmas which had an `Absorbing` condition, the condition has now become an alternative between `Affine` and `Absorbing`. Thus the lemmas are made more general. This is spreading the use of the `TCOr (Affine _) (Absorbing _)` pattern.
!757 with glen/big_op-TCOr-Affine in 17 minutes and 9 seconds (queued for 5 seconds)2 jobs for