pybind/mgr/dashboard: do not use distutils.version.StrictVersion

pybind/mgr/dashboard: do not use distutils.version.StrictVersion

replace `distutils.version.StrictVersion` with
`pkg_resources.parse_version()`

as the former is deprecated, see https://peps.python.org/pep-0632/.
let's use `pkg_resources` instead. this change also addresses
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1010894.
we have this issue when testing with an ubuntu jammy test node.
see https://bugs.launchpad.net/ubuntu/+source/ceph/+bug/1967139

Signed-off-by: Kefu Chai <tchaikov@gmail.com>