chore(enterprise/cli): remove dbmem from tests (#18795)

Related to https://github.com/coder/coder/issues/15109.

enterprise/cli/server_test.go

@@ -12,10 +12,20 @@ import (
 
 	"github.com/coder/coder/v2/cli/clitest"
 	"github.com/coder/coder/v2/cli/config"
+	"github.com/coder/coder/v2/coderd/database/dbtestutil"
 	"github.com/coder/coder/v2/enterprise/cli"
 	"github.com/coder/coder/v2/testutil"
 )
 
+func dbArg(t *testing.T) string {
+	if !dbtestutil.WillUsePostgres() {
+		return "--in-memory"
+	}
+	dbURL, err := dbtestutil.Open(t)
+	require.NoError(t, err)
+	return "--postgres-url=" + dbURL
+}
+
 // TestServer runs the enterprise server command
 // and waits for /healthz to return "OK".
 func TestServer_Single(t *testing.T) {
@@ -27,9 +37,10 @@ func TestServer_Single(t *testing.T) {
 	var root cli.RootCmd
 	cmd, err := root.Command(root.EnterpriseSubcommands())
 	require.NoError(t, err)
+
 	inv, cfg := clitest.NewWithCommand(t, cmd,
 		"server",
-		"--in-memory",
+		dbArg(t),
 		"--http-address", ":0",
 		"--access-url", "http://example.com",
 	)