Bug 1949850 [wpt PR 50877] - [gap-decorations] Parse row-rule-style property, a=testonly

Automatic update from web-platform-tests
[gap-decorations] Parse `row-rule-style` property

This CL introduces parsing for the `row-rule-style` property which
sets the styles of gap decorations in rows see:
https://drafts.csswg.org/css-gaps-1/#column-row-rule-style

Bug: 357648037
Change-Id: Idcf7575a720812cf5dec7221b09adc82f1ec43f1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6283305
Reviewed-by: Sam Davis Omekara <samomekarajrmicrosoft.com>
Reviewed-by: Alison Maher <almahermicrosoft.com>
Commit-Queue: Javier Contreras <javierconmicrosoft.com>
Reviewed-by: Kevin Babbitt <kbabbittmicrosoft.com>
Cr-Commit-Position: refs/heads/main{#1423236}

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wpt-commits: 61aa60a02309112a832f089ea271c8e3c95cfc51
wpt-pr: 50877

UltraBlame original commit: 553bb6e1a779e6529ff3165cbcad857d2bf9a2f3

Author: marco-c