[Network] Add front-door rules engine create without header

### Extension name (the extension in question)
front-door

### Description of issue (in as much detail as possible)
Actually it's not possible to create a rule with the "Override routing configuration" as action type, we have to create a rule with an Header action (via `az network front-door rules-engine rule create`) and after we can add other action via `az network front-door rules-engine rule action`
`az network front-door rules-engine rule create` should allow options of "action add"

Best regards,