support for inner and outer vlan-priority encoding

[DharmendraShetty]

**Is your feature request related to a problem? Yes

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Currently there is just a vlan-priority support which is applicable to outer vlan & inner-vlan the same value.
But we need support of vlan priority now specific to inner-vlan & outer-vlan.

Describe the solution you'd like
Provide the option of inner vlan-priority
say "inner-vlan-priority" attribute introduce under streams

A clear and concise description of what you want to happen.
Currently traffic stream defintion is below way:
"streams": [
{
"name": "Voice",
"stream-group-id": 1,
"type": "ipv4",
"direction": "downstream",
"priority": 128,
"vlan-priority": 2,
"network-ipv4-address": "10.0.0.10",
"pps": 100
}
]
The vlan-priority we have in the above stream, maps to both inner-vlan and outer-vlan the same value.
But the ask is, to provide support explicitly for inner-vlan , a vlan priority

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.
NA
Additional context

Add any other context or screenshots about the feature request here.
NA

Thanks,
Dharmendra