[Storage] Update get copy status cmdlet output type in help

[blueww]

Description

Fix #11851
This is not a breaking change, actually, the output type specified in cmdlet code and help are not right before, just change it to the correct value.

Since the change log already contains updating the 2 help file for this release, the change log is not in this PR.

Since it's already code complete, it's OK move the PR to the next release if we can't take it for this release.

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

[wyunchi-ms]

Please solve the StaticAnalysis issue of the PR.

[blueww]

Fixed the current failure

[blueww]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).