Chore: Ensure we save correct default admin user in integration test DB setup (#105752)

* fix helper + amend tests

* fix import + remove unused var

* remove more users

* remove unused code

* update test comment

pkg/tests/api/alerting/api_alertmanager_test.go

@@ -47,11 +47,6 @@ func TestIntegrationAMConfigAccess(t *testing.T) {
 		Password:       "editor",
 		Login:          "editor",
 	})
-	createUser(t, env.SQLStore, env.Cfg, user.CreateUserCommand{
-		DefaultOrgRole: string(org.RoleAdmin),
-		Password:       "admin",
-		Login:          "admin",
-	})
 
 	type testCase struct {
 		desc      string
@@ -365,12 +360,8 @@ func TestIntegrationAlertmanagerCreateSilence(t *testing.T) {
 		EnableUnifiedAlerting: true,
 		AppModeProduction:     true,
 	})
-	grafanaListedAddr, env := testinfra.StartGrafanaEnv(t, dir, path)
-	createUser(t, env.SQLStore, env.Cfg, user.CreateUserCommand{
-		DefaultOrgRole: string(org.RoleAdmin),
-		Password:       "admin",
-		Login:          "admin",
-	})
+	grafanaListedAddr, _ := testinfra.StartGrafanaEnv(t, dir, path)
+
 	client := newAlertingApiClient(grafanaListedAddr, "admin", "admin")
 
 	cases := []struct {
@@ -524,7 +515,7 @@ func TestIntegrationAlertmanagerStatus(t *testing.T) {
 	})
 
 	grafanaListedAddr, env := testinfra.StartGrafanaEnv(t, dir, path)
-	// Create a users to make authenticated requests
+	// Create users to make authenticated requests
 	createUser(t, env.SQLStore, env.Cfg, user.CreateUserCommand{
 		DefaultOrgRole: string(org.RoleViewer),
 		Password:       "viewer",
@@ -535,11 +526,6 @@ func TestIntegrationAlertmanagerStatus(t *testing.T) {
 		Password:       "editor",
 		Login:          "editor",
 	})
-	createUser(t, env.SQLStore, env.Cfg, user.CreateUserCommand{
-		DefaultOrgRole: string(org.RoleAdmin),
-		Password:       "admin",
-		Login:          "admin",
-	})
 
 	type testCase struct {
 		desc      string