make tre-deploy fails updating SharedSubnet as operation in progress

[marrobi]

Describe the bug
When running make tre-deploy occasionally get the below error. I expect this needs a dependancy somewhere?

│   with azurerm_cosmosdb_account.tre-db-account,
│   on statestore.tf line 1, in resource "azurerm_cosmosdb_account" "tre-db-account":
│    1: resource "azurerm_cosmosdb_account" "tre-db-account" {
│ 
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╷
│ Error: updating Network Security Group Association for Subnet: (Name "SharedSubnet" / Virtual Network Name "vnet-mrdeveast2" / Resource Group "rg-mrdeveast2"): network.SubnetsClient#CreateOrUpdate: Failure sending request: StatusCode=0 -- Original Error: autorest/azure: Service returned an error. Status=<nil> Code="AnotherOperationInProgress" Message="Another operation on this or dependent resource is in progress. To retrieve status of the operation use uri

[ross-p-smith]

I've recently come across AnotherOperationInProgress in Airlock Terraform - see #2222

[marrobi]

Believe to be fixed in #2414 . If reoccurs we can reopen.