fix: Updating AZ regex condition to support EU Sovereign Cloud AZ IDs.

[kgoutham93]

Description

AWS EU Sovereign cloud has different conventions for zone name and zone ids. Instead of asserting the regex on entire AZ id or AZ name, we resort to a simple logic -- split the az by hypen (-), if length(splits) == 2 we assume its AZ id.

{
    "AvailabilityZones": [
        {
            "OptInStatus": "opt-in-not-required",
            "Messages": [],
            "RegionName": "eusc-de-east-1",
            "ZoneName": "eusc-de-east-1a",
            "ZoneId": "euscdee1-az1",
            "GroupName": "eusc-de-east-1-zg-1",
            "NetworkBorderGroup": "eusc-de-east-1",
            "ZoneType": "availability-zone",
            "GroupLongName": "EU (Germany) 1",
            "State": "available"
        }
 ...
}

Motivation and Context

AWS EUSC has different naming conventions for AZ name and id.

Breaking Changes

None, I can think off.

How Has This Been Tested?

• I have updated at least one of the examples/* to demonstrate and validate my change(s)
• I have tested and validated these changes using one or more of the provided examples/* projects

I executed examples/simple for us-east-1 and eusc-de-east-1 by passing a mix of AZ names and AZ ids to azs list.

• I have executed pre-commit run -a on my pull request