redhat/configs: Move RHEL/Fedora lockdown configs to common

In 3290ab0b ("redhat/configs: Enable early lockdown for Arm"), the configuration was placed in the common/ hierarchy, but both Fedora and RHEL config hierarchies contained overrides. Since the configuration on both is the same, this moves everything over to common/. This has the side-effect of actually enabling early lockdown on Arm.

Signed-off-by: Jeremy Cline jeremycline@linux.microsoft.com