Fix various [bugprone-move-forwarding-reference] warnings reported by the clang static analysis.
Pull request: https://github.com/WebKit/WebKit/pull/17838
Committed 268071@main (8baba3493c60): <https://commits.webkit.org/268071@main> Reviewed commits have been landed. Closing PR #17838 and removing active labels.
<rdar://problem/115635173>