ipa-server-upgrade: fix inconsistency in setup_lightweight_ca_key_retrieval
The method setup_lightweight_ca_key_retrieval is called on
server upgrade and checks first if it needs to be executed or if
a previous upgrade already did the required steps.
The issue is that it looks for setup_lwca_key_retrieval in sysupgrade.state
but writes setup_lwca_key_retieval (with a missing r).
The fix consistently uses setup_lwca_key_retieval (as older installations
may already contain this key in sysupgrade.state).
Fixes https://pagure.io/freeipa/issue/7688
Reviewed-By: Fraser Tweedale <ftweedal@redhat.com>