Updated bundle parameter to include default array

[lisamurphy-msft]

Description

added in a default empty array value that will not issue a failure if the Microsoft.Security/pricings option is not available in region

Issue reference

The issue this PR will close: #649

Checklist

Please make sure you've completed the relevant tasks for this PR out of the following list:

• All acceptance criteria in the backlog item are met
• The documentation is updated to cover any new or changed features
• Manual tests have passed
• Relevant issues are linked to this PR

[lisamurphy-msft]

Putting this in draft; although it is shown to work in testing there was mention by @brooke-hamilton that we need to include guidance in our documentation for deployment instructions in other clouds to manually enable Pricings for Defender.

[brooke-hamilton]

Thanks for this PR. ✨ The empty array looks good. Did you discover that it's not possible to retrieve the list of bundles during the deployment?

I'm running a test deployment but here are my initial comments.

e3791a3 addressed requested changes