test: cap trino container memory at 4g in catalog tests

Trino's jvm.config sizes the heap at 80% of host RAM. On a loaded
self-hosted runner the JVM attempts to claim most of system memory
at boot and the container is killed ~15s after docker run — the
flake seen in CI today. Bounding the container to 4g gives the JVM
a fixed ~3.2g ceiling (observed usage is ~750mb), immune to host
memory pressure.

test/s3tables/catalog_trino/trino_catalog_test.go

@@ -466,6 +466,7 @@ func (env *TestEnvironment) startTrinoContainer(t *testing.T, configDir string)
 
 	cmd := exec.Command("docker", "run", "-d",
 		"--name", containerName,
+		"--memory", "4g",
 		"--add-host", "host.docker.internal:host-gateway",
 		"-v", fmt.Sprintf("%s:/etc/trino/catalog", configDir),
 		"-v", fmt.Sprintf("%s:/test", env.dataDir),