Deprecate Matomo

[rosiel]

https://groups.google.com/g/islandora/c/MtHOxjew-tA

Stop installing Matomo by default in Playbook, while leaving enough infrastructure in place that someone could turn it on, if desired.

[adam-vessey]

This might be as simple as flipping a couple bits of config:

• webserver_install_matomo and
• webserver_app_configure_matomo

?