Adding PrivateRange to AzFirewall

[b564518128]

Description

Add a new parameter "PrivateRange" to AzFirewall. It is a string array that specifies the ip addresses that should be treated as private so that the traffic to those addresses won't be snat'ed

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
• The title of the PR is clear and informative
• The appropriate ChangeLog.md file(s) has been updated:
  • For any service, the ChangeLog.md file can be found at src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md
  • A snippet outlining the change(s) made in the PR should be written under the ## Upcoming Release header -- no new version header should be added
• The PR does not introduce breaking changes
• If applicable, the changes made in the PR have proper test coverage
• For public API changes to cmdlets:
  • a cmdlet design review was approved for the changes in this repository (Microsoft internal only)
  • the markdown help files have been regenerated using the commands listed here

[VeryEarly]

Hi @b564518128 ,

Please fix the CI failures

[b564518128]

@VeryEarly Hi, I have fixed the CI. Please take a look and complete the PR