Add an API to trigger the confirm preview pipeline

[vinay033]

User Story

As an Automate User, I should be able to trigger the confirm preview pipeline.

Acceptance Criteria

• The API should only work if the user click on confirm on the preview screen
• The API should trigger the second pipeline function

Implementation Details

• In this file, add this function.

Definition of Done

• All things specified in User Story Acceptance Criteria should be fulfilled.
• All Exceptions are Handled Properly
• Ensure logs have no unnecessary data.
• Test coverage for the new feature is done to at least 70%
• If needed raise Docs PR and tag documentation.
• Swagger Documentation updated
• Smoke Test done.
• Ensure Build and Integration Pipelines are Green.
• PR has 2 approvers.
• All Code Review Comments are Resolved.
• README doc should be updated, if needed.