Port WebCompiledContentRuleListData to the new IPC serialization format.
Pull request: https://github.com/WebKit/WebKit/pull/20274
Committed 270505@main (5783584ba3aa): <https://commits.webkit.org/270505@main> Reviewed commits have been landed. Closing PR #20274 and removing active labels.
<rdar://problem/118218804>