GitLab

- Move microprofile-metrics-api dependency declaration from
  xwiki-commons-cache-infinispan to xwiki-commons
- Update dependency version from to 2.3 since it's the version used by
  the corresponding infinispan-core

- In xwiki-commons-cache-infinispan, add dependency on org.eclipse.microprofile.metrics:microprofile-metrics-api

XCOMMONS-2178: Extension updater still proposes upgrades for optional dependencies installed on a wiki

[misc] Try a different approach to avoid nexus repositories during xwiki-commons build (actually disabling them instead of using a completly different settings file)

[misc] Try building xwiki-commons with a special Maven settings (mainly to make sure to only find Maven Central dependencies)

* remove useless parameter

* update the XAR plugin to use new configuration format