Added Cost Estimate Workflow job

[Gordonby]

PR Summary

Adds a new job to the workflow that estimates the monthly cost of the deployment, which is then saved as a workflow artifact.

The purpose is to showcase additional features that can be integrated into Customers CI/CD pipelines, this does not affect the bicep/helper in any way.

Closes #469

BYO workflow

• Added cost prediction for environment. Ref Cost Estimates #469
• Bumped versions of dependant actions

Json output from the Estimate workflow step;

Private cluster workflow

• Added cost prediction for environment. Ref Cost Estimates #469

OSS Workflow

Additionally it solves the "OSS workflow, Get Latest AKSC release" item in #454 (Get latest AKSC version)

PR Checklist

• PR has a meaningful title
• Summarized changes
• This PR is ready to merge and is not Work in Progress
• Link to a filed issue

[Gordonby]

Once this issue gets fixed, i think we're good to merge this PR.

TheCloudTheory/arm-estimator#149

[Gordonby]

Once this issue gets fixed, i think we're good to merge this PR.

TheCloudTheory/arm-estimator#149

Ready!

[Gordonby]

Thanks for the feedback @samaea
I've set the workflow to not run Cost Estimate on PR.

[samaea]

Lgtm 👍