Add Oracle Linux 9

RHEL9 (and by extension Oracle Linux 9) does not support SHA-1 for "cryptographic purposes" in it's default security policy. Fedora is to follow suit in around Fedora 39.

Currently the following tests fail:

• system tests: autosign, rsabigexponent, kasp, keymgr2kasp, dnssec. The FIPS support work in !4281 (merged) fixes some of these system tests for OL9.
• unit tests: rsa_test. Not addressed in !4281 (merged).

[==========] Running 1 test(s).
[ RUN      ] isc_rsa_verify
0x20009 != 0
[   LINE   ] --- rsa_test.c:171: error: Failure!../../tests/unit-test-driver.sh: line 36: 14312 Aborted                 (core dumped) "${TEST_PROGRAM}"

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As a workaround we can enable SHA-1 in our Oracle Linux 9 image by update-crypto-policies --set DEFAULT:SHA1.

As it stands the workaround is currently no help for dnssec:check that NOTIFY is sent at the end of NSEC3 chain generation:

I:dnssec:sleeping ....
...
I:dnssec:sleeping ....
I:dnssec:nsec3 chain generation not complete
I:dnssec:failed

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Prereq: isc-projects/images!184 and !4281 (merged) (needs to be backported to v9.18 and v9.16 otherwise we can't test on OL9).