Rename incomingHighWaterMark/outgoingHighWaterMark to incomingMaxBufferedDatagrams/outgoingMaxBufferedDatagrams#58794

gsnedders wants to merge 2 commits intoweb-platform-tests:masterweb-platform-tests/wpt:masterfrom

gsnedders:webtransport-HighWaterMarkgsnedders/web-platform-tests:webtransport-HighWaterMarkCopy head branch name to clipboard