[stress testing] Set up storage file data contributor role for cluster test identities (#9276)

tools/stress-cluster/cluster/azure/cluster/workloadapproles.bicep

@@ -6,6 +6,7 @@ param workloadApps array
 var serviceBusDataOwnerRoleId = '090c5cfd-751d-490a-894a-3ce6f1109419'
 var eventHubsDataOwnerRoleId = 'f526a384-b230-433a-b45c-95f59c4a2dec'
 var storageBlobDataOwnerRoleId = 'b7e6dc6d-f1e8-4753-8033-0f276bb0955b'
+var storageFileDataContributorRoleId = '69566ab7-960f-475b-8e7c-b3118f30c6bd'
 var contributorRoleId = 'b24988ac-6180-42a0-ab88-20f7382dd24c'
 var userAccessAdministratorRoleId = '18d7d88d-d35e-4fb5-a5c3-7773c20a72d9'
 
@@ -45,6 +46,15 @@ resource workloadAppBlobDataOwner 'Microsoft.Authorization/roleAssignments@2020-
   }
 }]
 
+resource workloadAppFileDataContributor 'Microsoft.Authorization/roleAssignments@2020-04-01-preview' = [for i in range(0, length(workloadApps)): {
+  name: guid('workloadAppFileDataContributor', subscription().id, workloadApps[i].objectId)
+  properties: {
+    roleDefinitionId: subscriptionResourceId('Microsoft.Authorization/roleDefinitions', storageFileDataContributorRoleId)
+    principalId: workloadApps[i].objectId
+    principalType: 'ServicePrincipal'
+  }
+}]
+
 resource workloadAppEHDataOwner 'Microsoft.Authorization/roleAssignments@2020-04-01-preview' = [for i in range(0, length(workloadApps)): {
   name: guid('workloadAppEHDataOwner', subscription().id, workloadApps[i].objectId)
   properties: {