Github workflow: Handle soft-deleted resources on redeployment.

[mithunshanbhag]

Even if you delete the contoso-traders-rg resource group, the following resources are only soft-deleted.

• key vault
• cognitive service.

Consequently, when you attempt to redeploy using bicep, the deployment fails since the above resources are in a soft-deleted state.

Manual workaround is to either recover (recommended) or purge (not recommended) the soft-deleted resources using the portal.