fix prom-operator and prom-exporter crashes

Based on real world usage, it was noticed that promtheus-operator and prometheus-node-exporter where crashing, mainly due to OOM. The resources allocation where bumped accordingly

Closes: kubernetes/automation/charts/cern#5 (closed)

changed milestone to %R-2022-Q3-1

added A-monitoring label

requested review from @rbritoda

assigned to @dtomasgu

added p2 label

approved this merge request

merged

mentioned in commit a3f617ee