Merge pull request #18251 from jan--f/mgr-py-module-constants

pybind/mgr_module: move PRIO_* and PERFCOUNTER_* to MgrModule class

Reviewed-by: John Spray <john.spray@redhat.com>

diff --cc src/pybind/mgr/influx/module.py
Simple merge

diff --cc src/pybind/mgr/prometheus/module.py
Simple merge