Fix TIFF tests
This MR is to enable longstanding skipped test images in the TIFF test suite. There is no real reason anymore to keep them disabled, as:
- we do not support 32-bit anymore,
- I've implemented YCbCr in !1478 (merged),
- and floating point support in !907 (merged).
Test Plan
Build Krita. Run the tests and check that they all pass.
Formalities Checklist
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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.