Add 'validate' parameter to use during releases

[pjlewisuk]

Is your feature request related to a problem? Please describe.
Add a new parameter to be used during deployments and releases which can be used to set parameters or transform text within the helper during a release, e.g. changing az deployment group create to az deployment group create during the TestWebApp / Validation workflow.

Describe the solution you'd like
Add a parameter that can be passed into the workflow to toggle behaviour for deployment testing. See https://github.com/Azure/AKS-Construction/pull/642/files for how to pass the parameter into PlayWright.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[samaea]

Is this still an issue or resolved as part of our previous conversations?

[pjlewisuk]

It came up in discussions during the last release, so yeah, I think it's still needed.

[github-actions]

Issue smells stale, no activity for 30 days. Stale Label will be removed if the issue is updated, otherwise closed in a month.

[github-actions]

Issue smells stale, no activity for 30 days. Stale Label will be removed if the issue is updated, otherwise closed in a month.