feat: allow Richard/Scott/Ben to manually trigger backups

[bancey]

Jira link (if applicable)

N/A

Change description

Checklist

• commit messages are meaningful and follow good commit message guidelines
• README and other documentation has been updated / added (if needed)
• tests have been updated / new tests has been added (if needed)
• Does this PR introduce a breaking change

[hmcts-jenkins-cnp]

Plan Result

Plan: 0 to add, 1 to change, 0 to destroy.

• Update
  • azurerm_recovery_services_vault.darts-migration-backup

Change Result (Click me)

  # azurerm_recovery_services_vault.darts-migration-backup will be updated in-place
  ~ resource "azurerm_recovery_services_vault" "darts-migration-backup" {
        id                            = "/subscriptions/74dacd4f-a248-45bb-a2f0-af700dc4cf68/resourceGroups/darts-migration-stg-rg/providers/Microsoft.RecoveryServices/vaults/darts-prod-rsv"
        name                          = "darts-prod-rsv"
      ~ tags                          = {
            "application"         = "darts"
          + "autoShutdown"        = "true"
            "builtFrom"           = "https://github.com/HMCTS/darts-shared-infrastructure.git"
            "businessArea"        = "Cross-Cutting"
          + "contactSlackChannel" = "#darts-devs"
            "environment"         = "staging"
          + "managedBy"           = "Darts Modernisation"
        }
        # (7 unchanged attributes hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.