See https://github.com/libjxl/libjxl/blob/v0.9.x/CHANGELOG.md

### Removed
 - decoder API: the signature of `JxlDecoderGetColorAsEncodedProfile`,
   `JxlDecoderGetICCProfileSize`, and `JxlDecoderGetColorAsICCProfile`
   changed: a deprecated unused argument was removed.

While we're here, prefer use of JxlEncoderDistanceFromQuality.

### Added
 - encoder API: new function `JxlEncoderDistanceFromQuality` for convenience to
   calculate a `distance` given a `quality`

And backport commit 4caf924.

Targets the 8.15 branch.