ZTS: add centos stream10 (#16904)

Added centos as optional runners via workflow_dispatch

removed centos-stream9 from the FULL_OS runner list as CentOS is not
officially support by ZFS. This commit will add preliminary support for
EL10 and allow testing ZFS ahead of EL10 codebase solidifying in ~6
months

Signed-off-by: James Reilly <jreilly1821@gmail.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>