- install_utils.call: use shell=True for commands with ||, 2>, |, etc.
Avoids 'No matching repo to modify: 2>/dev/null, true, ||' when
dnf config-manager '... 2>/dev/null || true' is run via shlex.split.
- Add explicit 'rpm -e --nodeps MariaDB-server-compat-12.1.2-1.el9.noarch'
before dnf remove in main(), installMySQL, fix_almalinux9_comprehensive.
- upgrade fix_almalinux9_mariadb: add compat removal before MariaDB install;
use MariaDB 10.11 repo instead of 12.1 to avoid compat conflicts.
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