Update agent-pool to 22.04 since 20.04 is no longer available. (#399)#437

liuh-80 wants to merge 2 commits intosonic-net:202305sonic-net/sonic-gnmi:202305from

liuh-80:dev/liuh/cherry-build-fixliuh-80/sonic-gnmi:dev/liuh/cherry-build-fixCopy head branch name to clipboard