rgw: format help options to align with the rest

Whitespace removal to make all help options align in a similar fashion

Reviewed-by: Yehuda Sadeh <yehuda@redhat.com>
Signed-off-by: Abhishek Lekshmanan <abhishek.lekshmanan@gmail.com>
rgw: list all available options during help()

Adding the available help arguments from the man page

Fixes: #8112

Reviewed-by: Yehuda Sadeh <yehuda@redhat.com>
Signed-off-by: Abhishek Lekshmanan <abhishek.lekshmanan@gmail.com>
doc: update radosgw man page with available opts

Fixes:#8112

Reviewed-by: Yehuda Sadeh <yehuda@redhat.com>
Signed-off-by: Abhishek Lekshmanan <abhishek.lekshmanan@gmail.com>