[minor] Option to exclude Applications PVC backup and restore and other fixes

[sanjayprab]

• Option to include/exclude Apps' PVC backup and restore in B&R pipelines and interactive/noninteractive modes
• Fixes to the custom storage class fields passed to Facilities app task

Note:
If user excludes PVC backup and during restore they forgetfully choose to include PVC, the code will look for the pvc backup data in the archives and skips pvc backup if its absent without breaking the flow.

needs:

• [patch] Backup and restore - apps pvc optional and better error handling python-devops#395
• [minor] Backup and restore - option to exclude apps pvc ansible-devops#2325

Tests:

1. Backup Flow showing PVC backup option

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3. Backup pipeline showing Facilities PVC backup is skipped

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4. Restore Flow showing PVC restore option

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5. Restore Facilities app task showing the right values passed

[whitfiea]

We need to update the backup and restore docs with these new options?

[sanjayprab]

We need to update the backup and restore docs with these new options?

Thanks. Pushed the docs changes.