Allow cron schedules to be overridden in the CLI

[samath117]

Summary

The CLI for argo cron create should allow the option to override the default schedule.

Motivation

If I want to change the schedule for a CronWorkflow, I currently have to edit the CronWorkflow file itself. This is annoying if I want to repeatedly change it when my needs change.

Proposal

A new -s, --schedule option in argo cron create should allow for editing of the schedule, in much the same way that argo submit -p works to override/define workflow parameters. Additionally, if the schedule is left out of the file, argo cron create could still work properly if this option is invoked (again, the same as with workflow parameters).

---

Message from the maintainers:

If you wish to see this enhancement implemented please add a 👍 reaction to this issue! We often sort issues this way to know what to prioritize.

[alexec]

@simster7 do you want to own?

[simster7]

Sure