Bug 1834581 [wpt PR 40168] - Fix color-valid-color-mix-function test, a=testonly

Automatic update from web-platform-tests
Fix color-valid-color-mix-function test

For oklab and oklch 100% equals 1 and 100 is out of gamut but gets
clamped to 1.

https://csswg.sesse.net/css-color-4/#specifying-oklab-oklch
"""
The first argument specifies the CIE Lightness, L. This is a number between 0% or 0 (representing black) and 100% or 100 (representing white), Values less than 0% or 0 must be clamped to 0% at parsed-value time; values greater than 100% or 100 are clamped to 100% at parsed-value time.
"""

https://csswg.sesse.net/css-color-4/#hue-interpolation
"specified hue" no longer exists

Remove some duplicate tests.

Bug: 1448121
Change-Id: I1dea9178d18005489fdbc0f8c38c5ca8006efad5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4557744
Commit-Queue: Aaron Krajeski <aaronhkchromium.org>
Reviewed-by: Yi Xu <yiyixchromium.org>
Cr-Commit-Position: refs/heads/main{#1148755}

--

wpt-commits: b4e14acc96ac86c159ee76b86957091ca411149a
wpt-pr: 40168

UltraBlame original commit: 13728a0d0c35e50a219bfc34c51fbc0dcc1ff945

Author: marco-c