CRAYSAT-1896: Add --cfs-version option to sat bootprep run

Add the `--cfs-version` command-line option to `sat bootprep run`. This
option is used to select the version of the CFS API to use when creating
CFS configurations or checking for the existence of CFS configurations
when creating other items in the bootprep input file.

Add this option to the man page as well.

Test Description:
Built man page and examined in `man`.

Other testing yet to be performed on a system.

docs/man/sat-bootprep.8.rst

@@ -137,6 +137,10 @@ These options only apply to the ``run`` action.
 **--bos-version BOS_VERSION**
         The version of the BOS API to use when creating BOS session templates.
 
+**--cfs-version CFS_VERSION**
+        The version of the CFS API to use when creating or checking for the
+        existence of CFS configurations.
+
 **--recipe-version RECIPE_VERSION**
         The HPC CSM Software Recipe version, e.g. 22.03. This is used to obtain the
         product versions which can be substituted for variables specified in

sat/cli/bootprep/parser.py

@@ -259,6 +259,11 @@ def _add_bootprep_run_subparser(subparsers):
         choices=['v1', 'v2'],
         help='The version of the BOS API to use for BOS operations',
     )
+    run_subparser.add_argument(
+        '--cfs-version',
+        choices=['v2', 'v3'],
+        help='The version of the CFS API to use for CFS operations',
+    )
 
     add_vars_options(run_subparser)
     add_skip_and_overwrite_options(run_subparser, 'config', 'configuration')