pgsql: pgcrypto: avoid recursive ResourceOwnerForget().

pgcrypto: avoid recursive ResourceOwnerForget().

Raising an error within a function using an OSSLCipher object led
to a complaint from ResourceOwnerForget and then a double-free crash,
because ResOwnerReleaseOSSLCipher forgot to unhook the OSSLCipher
object from its owner. (The sibling logic for OSSLDigest objects got
this right, as did every other ReleaseResource function AFAICS.)

Oversight in cd694f60d.

Bug: #19527
Reported-by: Yuelin Wang <3020001251(at)tju(dot)edu(dot)cn>
Author: Yuelin Wang <3020001251(at)tju(dot)edu(dot)cn>
Reviewed-by: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Discussion: https://postgr.es/m/19527-6e7686960c6dce78@postgresql.org
Backpatch-through: 17

Branch
------
REL_18_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/020426268ff6acaa140780336eb1c50b034cb893

Modified Files
--------------
contrib/pgcrypto/openssl.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)