[9.20] fix: dev: Make BIND9 compatible with OpenSSL 4

OPENSSL_cleanup() in OpenSSL 4 doesn't free the memory, and that is
not compatible with BIND 9's memory leak detection code. Don't use
custom allocation/deallocation functions for OpenSSL's internal memory
management.

See https://github.com/openssl/openssl/pull/29721

Closes #5808

Backport of MR !11865

Merge branch 'backport-5808-openssl4-compat-fix-9.20' into 'bind-9.20'

See merge request isc-projects/bind9!11896