Add support for custom sort order

[SimonWahlin]

Overview/Summary

Add option to configure in which order templates will be deployed by adding a conditional step between Diff and Validate/Deploy.

I am a bit uncertain on if the variable AZOPS_CUSTOM_SORT_ORDER should be put into the credentials variable group or if a new group should be created. If a new group should be created, I am uncertain of what to name it.
I have considered the following names:

• azops
• azopsConfig
• config

I do not think it should be named anything related to settings to avoid confusion with settings.json

This PR fixes/adds/changes/removes

1. Add support for custom sort order of templates

Breaking Changes

For Azure DevOps only: Requires creation of variable group azops as well as granting pipelines access to that group.

Testing Evidence

CustomSorting step sorts files in diff.txt

Deploy step uses parameter -CustomSortOrder and picks up on the order in diff.txt

As part of this Pull Request I have

• Checked for duplicate Pull Requests
• Associated it with relevant issues, for tracking and closure.
• Ensured my code/branch is up-to-date with the latest changes in the main branch
• Performed testing and provided evidence.
• Updated relevant and associated documentation. (Updated docs for Custom Sort Order AzOps#660)

Fixes Azure/AzOps#592

[daltondhcp]

I have tested the functionality and it works as expected - awesome job! 😄
Do you think it makes sense to externalize the script as it becomes quite cumbersome to manage 30+ lines of PS directly in the yaml pipeline?

[SimonWahlin]

Sure, I can put the code in a scripts folder. How about .pipelines/.script/customSortOrder.ps1?

Or maybe have a generic location for both GitHub and ADO? Maybe .scripts/customSortOrder.ps1?

[daltondhcp]

Sure, I can put the code in a scripts folder. How about .pipelines/.script/customSortOrder.ps1?

Or maybe have a generic location for both GitHub and ADO? Maybe .scripts/customSortOrder.ps1?

Sounds like a good plan to me!

[SimonWahlin]

Sorry for the delay, should be working now.