Remove ARM template to reduce overhead. (Azure#24270)

sdk/digitaltwins/azure-digitaltwins-core/src/test/resources/prerequisite/prerequisite readme.md

@@ -30,7 +30,7 @@ The script outputs [test-resources.bicep](https://github.com/Azure/azure-sdk-for
 
 ### Generate the ARM template
 
-The ARM template [test-resources.json](https://github.com/Azure/azure-sdk-for-java/blob/main/sdk/digitaltwins/test-resources.json) is generated from the [test-resources.bicep](https://github.com/Azure/azure-sdk-for-java/blob/main/sdk/digitaltwins/test-resources.bicep) file by running the following script
+The ARM template is generated from the [test-resources.bicep](https://github.com/Azure/azure-sdk-for-java/blob/main/sdk/digitaltwins/test-resources.bicep) file by running the following script
 
 - `.\generateArmTemplate.ps1`
 

sdk/digitaltwins/azure-digitaltwins-core/src/test/resources/prerequisite/setup.ps1

@@ -82,13 +82,17 @@ if ($rgExists -eq "False")
     az group create --name $ResourceGroup --location $Region --output none
 }
 
+Write-Host "`nGenerating the ARM template using the cli bicep extention."
+$bicepFilePath = Join-Path -Path $PSScriptRoot -ChildPath "../../../../../test-resources.bicep";
+az bicep build --f $bicepFilePath
+
 Write-Host "`nDeploying resources to $ResourceGroup in $Region`n"
 
 $armTemplateFile = Join-Path -Path $PSScriptRoot -ChildPath "../../../../../test-resources.json";
 
 if (-not (Test-Path $armTemplateFile -PathType leaf))
 {
-    throw "`nARM template was not found. Please make sure you have an ARM template file named test-resources.json in the root of the service directory`n"
+    throw "`nARM template was not found. Please make sure you have a bicep file called test-resources.bicep in the root of the service directory`n"
 }
 
 # Deploy test-resources.json ARM template.
@@ -128,4 +132,7 @@ $protectedBytes = [Security.Cryptography.ProtectedData]::Protect($bytes, $null,
 Set-Content $outputFile -Value $protectedBytes -AsByteStream -Force
 Write-Host "`nTest environment settings stored into encrypted $outputFile`n"
 
+Write-Host "`nRemoving generated ARM template JSON file."
+rm -r $armTemplateFile
+
 Write-Host "Done!"