User can now add description for the approvaltask in the params of
pipelinerun/customrun in the same way approvers and number of
approvals required are added
Needs approval from an approver in each of these files:
- ~~[OWNERS](https://github.com/openshift-pipelines/manual-approval-gate/blob/main/OWNERS)~~ [PuneetPunamiya]
Approvers can indicate their approval by writing `/approve` in a comment
Approvers can cancel approval by writing `/approve cancel` in a comment
Signed-off-by: PuneetPunamiya ppunamiy@redhat.com