Bug 1872466 [wpt PR 43825] - Fix css math progress function implementation in favor...

Bug 1872466 [wpt PR 43825] - Fix css math progress function implementation in favor of spec change, a=testonly

Automatic update from web-platform-tests
Fix css math progress function implementation in favor of spec change

Change from `current / (end - start)` to `(current - start) / (end - start)

Bug: 1503730
Ref: https://bugs.chromium.org/p/chromium/issues/detail?id=1503730#c10
Ref: https://github.com/w3c/csswg-drafts/commit/921e2c01c1a929f23d17211d0b6ebb0bf3471bb1
Ref: https://drafts.csswg.org/css-values-5/#progress-func
Change-Id: I4b641f421a612fea75e6bed558865e882b43f760
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5156587
Reviewed-by: Daniil Sakhapov <sakhapov@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Rune Lillesveen <futhark@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1247092}

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wpt-commits: 8080d7aafbce0c75571bdc83bd2b9d6f9bf0fa89
wpt-pr: 43825