Start building out the test suite a bit more

test/test_internals/deps.go

test/test_internals/deps_mmr.go

test/test_internals/deps_network.go

test/test_internals/deps_synapse.go

test/test_internals/testcontainers_ext.go

test/test_internals/util.go

test/test_internals/util_client.go

test/test_internals/util_client_api_types.go

test/upload_suite_test.go