Merge pull request #16393 from TooManyBees/lua-metric-prometheus-types

Recursor: add types and descriptions to dynamic metrics defined in Lua

diff --cc pdns/recursordist/rec_channel_rec.cc
Simple merge

diff --cc pdns/recursordist/ws-recursor.cc
Simple merge

diff --cc regression-tests.recursor-dnssec/test_Prometheus.py
Simple merge