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.
2 jobs for !757 with glen/big_op-TCOr-Affine in 17 minutes and 9 seconds (queued for 5 seconds)
merge request
Name Stage Failure
build-coq.8.12.2 Build
make[2]: Target 'real-all' not remade because of errors.
make[1]: *** [Makefile.coq:339: all] Error 2
make: *** [Makefile:3: all] Error 2

real 2m5.590s
user 7m32.525s
sys 0m32.082s
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1