Regression caused by 5ecb70964e. This is, because renders of individual
strips could no longer be reused when cache is completely disabled
during rendering.
Instead of disabling cache completely, flag cache entries as temporary.
When reading entries also skip disk cache, since in 5ecb70964e goal was
to avoid reading from disk cache.
5ecb70964e also affected visual output of rendered image. This is
reported in #131106. Because of this 1 test must be updated.
Root cause for #131106 is, that byte image was automatically converted
to float, due to processing with other float image. Then the same byte
image was used for processing with another byte image. Before
5ecb70964e this byte converted to float image would be cached, which
caused float code paths to be used. This is correct behavior.
After 5ecb70964e, no image is cached, so float data were not saved, so
byte code path was executed in second processing step.
Pull Request: https://projects.blender.org/blender/blender/pulls/130781
618b7f4a9b