* Fix ansible_cmdline initrd fact for UEFI
UEFI cmdline paths use \ path sep which would
get munged by cmdline fact collection.
* Make CmdLineFactCollector easier to test
extract the parsing of the /proc/cmdline content to
_parse_proc_cmdline()
add a wrapper method for get_file_content _get_proc_cmdline()
Add unit tests of _parse_proc_cmdline based on examples
from issue #23647Fixes#23647
f4128746d3