2020-12-01 Rest API release fix issues

[Sandido]

Description

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)
    • {Please put the link here}
  • the markdown help files have been regenerated using the commands listed here

[grizzlytheodore]

@dingmeng-xue this PR is for removing all the ContainerServices (API deprecated) related code.

[grizzlytheodore]

adding 'EncryptionatHost: ' parts are to avoid build errors. New property was added in to SecurityProfile property and needed to specify.

[VeryEarly]

I suggest you to resolve all the CI failures for one of these two PRs:
#14186

and working on the other one (there are duplicates in these two PRs)