LU-4315 docs: updating lfs-[m-q] mage page style

LU-4315 docs: updating lfs-[m-q] mage page style

Updating files to match the new code style for Lustre manual pages as
enforced by 'contrib/scripts/checkpatch-man.pl'. This also includes
other changes like removing < > or { } for singular required
arguments and placing [ ] around optional ones as well as making all
arguments CAPITAL and italicized, literal arguments are bolded.

Only using features that appear in groff 1.22.3 as this is the
available version is CentOS 8.

Checked files:
- lfs-mkdir.1
- lfs-path2fid.1
- lfs-pcc.1
- lfs-pcc-attach.1
- lfs-pcc-detach.1
- lfs-pcc-delete.1
- lfs-pcc-state.1
- lfs-project.1

Test-Parameters: trivial
Signed-off-by: Frederick Dilger <fdilger@whamcloud.com>
Change-Id: Iefaad081f9a4f6627f0c7ac4e9e59c4bc099fa93
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/57890
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>