Make beta jobs to complain on #wikimedia-qa

This change all the beta cluster related jobs to send an IRC
notification on #wikimedia-qa whenever a job becomes a FAILURE or a
SUCCESS.  That might help notice potential breakages.

Jobs updated:

beta-code-update-eqiad
beta-cxserver-update-eqiad
beta-mediawiki-config-update-eqiad
beta-parsoid-update-eqiad
beta-scap-eqiad
beta-update-databases-eqiad

Bug: 69628
Change-Id: I6ce7e726f0e33078fe68512688e6c61a8604b91f