[Storage] Integrate XSCL v12 to Storage module, to support new storage features

[blueww]

Description

For Design:

There are no syntax changes, so no review docs raised in https://github.com/Azure/azure-powershell-cmdlet-review-pr

But I have raised a design doc, Erich has helped to review it. https://microsoft.sharepoint.com/:w:/t/XClientShanghai/EVNIP90Ijg1KsZT0VFEA6pgB33mx1WbdypGOXWTkLvgTHA?e=7SjutU

For Oauth:

For the oauth token, I implement my own class "AzureSessionCredential", I can switch to the common one provided by Powershell team (prototype： https://github.com/erich-wang/azure-powershell/commit/2b3791333) when it's merged to master.

Commits:

This PR include many changes from master, which is not already on storage branch.
Only the last commit is for this feature change.
When #11161 is merged, should only left the last commit.

For test:

I have tested it works on

• Powershell 5.1
• Powershell 6.2.4

With authentication:

1. Key
2. SAS
3. Oauth
4. Anonymous

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)
  • the markdown help files have been regenerated using the commands listed here

[erich-wang]

/azp run

[azure-pipelines]

Pull request contains merge conflicts.