Enable ameba linter

[Sija]

Resolves #14608

[Sija]

I've managed to get it running after a few tries - GHA don't allow GITHUB_TOKEN secret usage unless the proper permissions are given (see this SO question for example), so for the time being I've circumvented the problem by using a locally installed version, so we can see the actual output.

Finished in 51.78 seconds
2041 inspected, 373 failures

[Sija]

I've cooked a config file which disables the biggest offenders and (most likely) unwanted rules.
Next steps I can think of are as follows:

1. Scrutinize current .ameba.yml config file choices
2. Triage existing issues
3. Discern between the issues to correct and the ones to ignore
4. Act accordingly

[straight-shoota]

What do you need GITHUB_TOKEN secret for?

[Sija]

@straight-shoota Ameba's github action needs it.

[ysbaddaden]

@straight-shoota It needs the token to report Ameba issues as comments on the PR.