CDRIVER-4608 Reload expansions before deleting Azure resources

[kevinAlbs]

Summary

• Reload expansions before deleting Azure resources

Verified by this patch

Background & Motivation

This is an improvement to the testazurekms_task_group added as part of DRIVERS-2411.

If setup_group fails before running expansions.update, the teardown_group will not have the required expansions to delete resources.

Here is an example failure in setup_group. The logs in teardown_group show the delete-vm.sh script failing to run:

[2023/04/07 15:50:54.776] Please set the following required environment variables
[2023/04/07 15:50:54.776]  AZUREKMS_RESOURCEGROUP
[2023/04/07 15:50:54.776]  AZUREKMS_VMNAME

This results in the Azure resources not being deleted.

With changes in this PR, a failure in setup_group results in the Azure resources being deleted:

[2023/04/07 16:05:18.111] Deleting Virtual Machine vmname-CDRIVER-8130 ... begin
[2023/04/07 16:05:18.112] Deleting Virtual Machine vmname-CDRIVER-8130 ... end
[2023/04/07 16:05:18.112] Delete public IP vmname-CDRIVER-8130-PUBLIC-IP ... begin
[2023/04/07 16:05:40.172] Delete public IP vmname-CDRIVER-8130-PUBLIC-IP ... end