Finish matomo integration #1240
Description
This hangs on https://github.com/ufal/lindat_piwik_reports which needs to work with custom dimensions which v7 uses to record handles
#1177 is probably ready to be closed
#1150/#1047 has a PR in #1214
ufal/dspace-angular#9 has some work in ufal/dspace-angular#19 and I have a POC locally. But this also needs to call the subscribe/unsubscribe api