445179 Fix OpenGL ES initialization for OCIO pipeline too

This MR backports the GLES surface initialization changes for Android to the OCIO-backed canvas.

CCBUG: 445179

Test Plan

Build Krita with OCIO on an OpenGL ES system. (Preferably Android, though a desktop platform with Qt built with -opengl es2 will suffice too.)

Check that all bit depths we support work out of the box.

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.