Enforce stable LC_ALL=C.UTF-8 in jobs environment
FreeIPA uses oddjobd to run Python scripts. It also expects that the
execution environment uses UTF-8 encoding. On RHEL 8.4 default
configuration changed to provide LC_ALL=en_US which uses ISO-8859-1
encoding instead of UTF-8.
Enforce C.UTF-8 to not depend on the system defaults.
Signed-off-by: Alexander Bokovoy <firstname.lastname@example.org>