infra: Remove hardcoded ephemeral flag, use config value

Windows were hardcoded to be ephemeral but we need the ability to
actually set these to be non-ephemeral

Signed-off-by: Eli Uriegas <eliuriegasfb.com>

ghstack-source-id: 4dfacd11f858b53edb9ed38cfdf9c80c43369e45
Pull Request resolved: #1420

terraform-aws-github-runner/modules/runners/templates/install-config-runner.ps1

@@ -47,7 +47,7 @@ foreach ($group in @("Administrators", "docker-users")) {
 Set-ItemProperty HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System -Name ConsentPromptBehaviorAdmin -Value 0 -Force
 Write-Host "Disabled User Access Control (UAC)"
 
-$configCmd = ".\config.cmd --unattended --ephemeral --name $InstanceId --work `"_work`" $config"
+$configCmd = ".\config.cmd --unattended --name $InstanceId --work `"_work`" $config"
 Write-Host "Invoking config command..."
 Invoke-Expression $configCmd