Fix update activity log alert rule when using ObjectInput from the pipe

[Avivskie]

this fixes the update alert rule issue.

Description

There is an issue when updating an alert when the alert rule is received and as InputObject.
This is because InputObject had duplicated Actions/Conditions.
The remove of the ctor solves this, it is seem unnecessary.

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

[ghost]

All CLA requirements met.

[VeryEarly]

for code changes please add ChangeLog next time

[VeryEarly]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).