Improving shortname handling of --addons flag

[amandakys]

Description

The shortnames we've allocated for the add ons fluctuate on whether they are plural or not. log vs logs, test vs tests.

At the moment the short names are: log,test,lint,data,docs,viz. But many engineers instinctively think of logs rather than log and tests rather than test. However, lints doesn't work. etc

Having discussed with @AhdraMeraliQB @noklam we weren't able to find a consistent rule to apply across all the options.

Proposal:
either

1. accept both options i.e. both --addons=log and --addons=logs will work to select the logging addon
2. implement smarter error messages i.e. if the user types logs but its meant to be log we error Did you mean --addons=log to help them realise their mistake. Same for tests and test

[merelcht]

Completed in #3363