Use unique resource names in test Terraform Recipe (radius-project#7108)

# Description

Trying a fix for radius-project#7060.
Resource name uniqueness is tied to resource group right now,
potentially causing concurrency issues.

## Type of change

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Fixes: radius-project#7060

Signed-off-by: karishma-chawla <74574173+karishma-chawla@users.noreply.github.com>
Co-authored-by: karishma-chawla <74574173+karishma-chawla@users.noreply.github.com>

test/functional/shared/resources/testdata/corerp-resources-terraform-azurestorage.bicep

@@ -27,7 +27,6 @@ resource env 'Applications.Core/environments@2023-10-01-preview' = {
           templateKind: 'terraform'
           templatePath: '${moduleServer}/azure-storage.zip'
           parameters: {
-            name: 'blob${uniqueString(resourceGroup().id)}'
             resource_group_name: resourceGroup().name
             location: location
           }

test/functional/shared/resources/testdata/recipes/test-terraform-recipes/azure-storage/main.tf

@@ -7,21 +7,25 @@ terraform {
   }
 }
 
+resource "random_id" "unique_name" {
+  byte_length = 8
+}
+
 resource "azurerm_storage_account" "test_storage_account" {
-  name = var.name
+  name = "acct${random_id.unique_name.hex}"
   resource_group_name = var.resource_group_name
   location = var.location
   account_tier = "Standard"
   account_replication_type = "LRS"
 }
 
 resource "azurerm_storage_container" "test_container" {
-  name = "test-container"
+  name = "ctr${random_id.unique_name.hex}"
   storage_account_name = azurerm_storage_account.test_storage_account.name
 }
 
 resource "azurerm_storage_blob" "test_blob" {
-  name = "test-blob"
+  name = "blob${random_id.unique_name.hex}"
   storage_account_name = azurerm_storage_account.test_storage_account.name
   storage_container_name = azurerm_storage_container.test_container.name
   type = "Block"

test/functional/shared/resources/testdata/recipes/test-terraform-recipes/azure-storage/variables.tf

@@ -1,7 +1,3 @@
-variable "name" {
-  type = string
-}
-
 variable "resource_group_name" {
   type = string
 }