Multidimention export gih

This add support for exporting gih brush with all supported gih dimentions. The patch does not modify how custom brushes from predefined "stamp" creation works. Only adds more export options for gih

Test Plan

Tested exporting of many rank combinations.

Formalities Checklist

• I confirmed this builds.
• I confirmed Krita ran and the relevant functions work.
• I tested the relevant unit tests and can confirm they are not broken. (If not possible, don't hesitate to ask for help!)
• I made sure my commits build individually and have good descriptions as per KDE guidelines.
• I made sure my code conforms to the standards set in the HACKING file.
• I can confirm the code is licensed and attributed appropriately, and that unattributed code is mine, as per KDE Licensing Policy.