[Synapse] - Enhance existing cmdlets to support the next generation of SQL pool (so called Gen3 or v3)

[idear1203]

Description

• New-AzSynapseSqlDatabase now supports storage redundancy
  • Removed parameter -MaxSizeInBytes. It is no longer supported any more.
  • Added parameter -StorageRedundancy. Possible values: Geo, GeoZone, Local, Zone
• New-AzSynapseSqlPool now supports autoScale and autoPause
  • Added parameters -MaxServiceObjectName -AutoPauseTimer -EnableAutoResume
• Resume-AzSynapseSqlPool, Suspend-AzSynapseSqlPool now supports SQL pool Gen3
  • Added parameter -Version
• Update-AzSynapseSqlPool now supports autoScale and autoPause
  • Added parameters -MaxServiceObjectName -AutoPauseTimer -AutoResume

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
• The title of the PR is clear and informative
• The appropriate ChangeLog.md file(s) has been updated:
  • For any service, the ChangeLog.md file can be found at src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md
  • A snippet outlining the change(s) made in the PR should be written under the ## Upcoming Release header -- no new version header should be added
• The PR does not introduce breaking changes
• If applicable, the changes made in the PR have proper test coverage
• For public API changes to cmdlets:
  • a cmdlet design review was approved for the changes in this repository (Microsoft internal only)
    • https://github.com/Azure/azure-powershell-cmdlet-review-pr/issues/975
  • the markdown help files have been regenerated using the commands listed here