Add wait/no-wait support to Commands

PR #1463 added support for the ... wait command for select command groups and the --no-wait option for several long-running operations in those groups. This issue is for identifying and tracking which commands still need this functionality exposed. Please nominate additional commands to be given wait/no-wait capability in the comments.

Needed

• acr repository delete
• postgres server firewall-rule create/delete
• provider register [issue #1910] (from @yugangw-msft we probably can live with it, as it is not a common op)
• storage file|blob copy (i.e. wait until a copy operation is finished) [issue #1787]

Completed

• sql server create (PR #9022)
• cdn endpoint purge (PR #8792)
• container start/restart (PR #8600)
• snapshot create (PR #7836)
• local-gateway create/update/delete (PR #2524)
• express-route create/update/delete (PR #2524)
• vnet-gateway create/update/delete (PR #2524)
• vmss create/update/delete/start/stop/deallocate/… (PR #2524)
• vm delete/deallocate/start/stop/… (PR #2524)
• vm user (PR #2524)
• vm create/update (PR #1463)
• group delete (PR #1463)
• group deployment create (PR #1463)
• application-gateway create/update/delete (PR #1463)
• vnet-gateway create/update (PR #1463)
• az disk commands (PR #3390)
• network nic create (PR #6684)
• vm extension set (PR #6684)
• group deployment delete (PR #6684)

[adamrushuk]

Please add --no-wait support for az image delete?

[mrx88]

I would really like to get --no-wait for “az network nic create” and “am vm extension set” commands.