gh-91404: Revert "bpo-23689: re module, fix memory leak when a match is terminated by a signal or allocation failure (GH-32283) (GH-93882)

Revert "bpo-23689: re module, fix memory leak when a match is terminated by a signal or memory allocation failure (GH-32283)"

This reverts commit 6e3eee5c11b539e9aab39cff783acf57838c355a.

Manual fixups to increase the MAGIC number and to handle conflicts with
a couple of changes that landed after that.

Thanks for reviews by Ma Lin and Serhiy Storchaka.
(cherry picked from commit 4beee0c7b0c2cc78a893dde88fd8e34099dcf877)

Co-authored-by: Gregory P. Smith <greg@krypto.org>