refactor(mock-paymaster): replace wait-port with custom anvil wait sc… #41

Job	Run time
build-and-push-image (./mock-contract-deployer, ./mock-contract-deployer/Dockerfile, ghcr.io/piml...	1m 18s
build-and-push-image (./mock-verifying-paymaster, ./mock-verifying-paymaster/Dockerfile, ghcr.io/...	1m 19s
	2m 37s

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