gh-153570: Fix use-after-free in bytearray.take_bytes() with a reentrant __index__...

gh-153570: Fix use-after-free in bytearray.take_bytes() with a reentrant __index__ (#153572)

bytearray.take_bytes() cached the size before the argument's __index__ call and
used it for the bounds check and the buffer reads, so an __index__ that resizes
the bytearray left it reading freed memory. Re-read the size after __index__,
matching bytearray.__setitem__ (GH-91153).