[Firewall]az network firewall create: Add new parameter --tier

[Yuchao Yan (msyyc)]

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RE: Firewall Premium changes - Azure CLI

This checklist is used to make sure that common guidelines for a pull request are followed.

need to fix test :

test_azure_firewall_management_ip_config
test_azure_firewall_virtual_hub

General Guidelines

• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally?

For new extensions:

• My extension description/summary conforms to the Extension Summary Guidelines.

About Extension Publish

There is a pipeline to automatically build, upload and publish extension wheels.
Once your PR is merged into master branch, a new PR will be created to update src/index.json automatically.
The precondition is to put your code inside this repo and upgrade the version in the PR but do not modify src/index.json.

[Yong Zhang (yonzhan)]

Firewall