[ticket/11548] Fix incorrect usage of array_map on acp groups page

The array_map was only ran on small parts of the actual error array instead
of the whole one. This resulted in the output of the language variables' names
rather than their actual value.

PHPBB3-11548
Merge remote-tracking branch 'marc1706/ticket/11548-develop-olympus' into develop-olympus

* marc1706/ticket/11548-develop-olympus:
  [ticket/11548] Fix incorrect usage of array_map on acp groups page
[ticket/11668] Run lint test at the end of the test suite

The lint test is very slow. Running it at the end should speed up the development cycle.

PHPBB3-11668
Merge remote-tracking branch 'remotes/igorw/ticket/11668' into develop-olympus

# By Igor Wiedler
# Via Igor Wiedler
* remotes/igorw/ticket/11668:
  [ticket/11668] Run lint test at the end of the test suite
[develop-olympus] Bumping version numbers to final for 3.0.12 releases.
[develop-olympus] Bump version numbers for 3.0.12-RC1 release.
[develop-olympus] Add changelog for 3.0.12 release.
[develop-olympus] Increment version number to 3.0.13-dev.