Introduce an `auto` option for drupal/flymake-phpcs-run-in-place

`Auto` will do a `run-in-place` on .info files and in `tempdir` on
everything else.

That should make Drupal Coder Sniffer do the right thing with current
rules:

- constants will be checked with the right module name.

- files[] entries in .info files will be checked against th actual
  files.