REGRESSION (249698@main): 4 payment request layout tests failing on Big Sur
https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&test=http%2Ftests%2Fpaymentrequest%2Fpayment-request-change-shipping-option.https.html&test=http%2Ftests%2Fpaymentrequest%2FupdateWith-shippingOptions.https.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fpayment-request%2Fpayment-request-constructor.https.sub.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fpayment-request%2Fpayment-request-shippingOption-attribute.https.html
Looks like these need Big Sur baselines.
Landed rebaselines in https://commits.webkit.org/249730@main
<rdar://problem/91911037>