PHPUnit test failure with 3.0-rc11

Unfortunately this is a won't fix for now, as we're integrating the new sticky form actions (preparation for core). You can leverage Gin's form function temporarily (see Gin's own tests), as we need to do functional changes in Core.

@saschaeggi: Could you please link to the issue in core?

@volkerk here you go -> https://www.drupal.org/project/drupal/issues/3456202 ✨ PHPUnit tests: Support form actions being outside of a form Active

Re #3 what form function are you referring to? There's only 1 test in the theme and it uses a submitForm in testUserSettings

@acbramley not needed anymore as we have refactored this so it works with the regular submitForm again provided by Core.

@saschaeggi thanks! That must be on the 4.x branch though? I'm currently having to use 3.x since gin_lb isn't compatible with 4.x yet.

The patch in ✨ PHPUnit tests: Support form actions being outside of a form Active does work though :)