Followup after 256361@main, which omitted a change in `RemoteLayerWithRemoteRenderingBackingStoreCollection::allocateBufferForBackingStore()` which is necessary to pass the correct colorspace when creating buffers for page layers.
<rdar://problem/102071086>
Pull request: https://github.com/WebKit/WebKit/pull/6237
Committed 256454@main (9c7cd20eac41): <https://commits.webkit.org/256454@main> Reviewed commits have been landed. Closing PR #6237 and removing active labels.