Add AtResource Workbook for ServiceBus to start implementing Portal changes

[ppgovekar]

Add AtResource Workbook for ServiceBus to start implementing Portal changes

Adding AtResource Workbook for ServiceBus which is shared by Ashish for getting started with Portal changes to replace Metric ResourceMenu with Workbook and Insights.

Screenshot of how Workbook will look in the Portal:

If adding or updating templates:

• post a screenshot of templates and/or gallery changes
• ensure your template has a corresponding gallery entry in the gallery folder
• If you are adding a new template, add your team and template/gallery file(s) to the CODEOWNERS file. CODEOWNERS entries should be teams, not individuals
• ensure all steps have meaningful names
• ensure all parameters and grid columns have display names set so they can be localized
• ensure that parameters id values are unique or they will fail PR validation (parameter ids are used for localization)
• ensure that steps names are unique or they will fail PR validation (step names are used for localization)
• grep /subscription/ and ensure that your parameters don't have any hardcoded resourceIds or they will fail PR validation
• remove fallbackResourceIds and fromTemplateId fields from your template workbook or they will fail PR validation

[yves-chan]

@ppgovekar I gave it another review, just some minor cocmments and I think it's good to go!

[yves-chan]

@ppgovekar, approved, feel free to merge