fix(job-scheduler): use delayed job data when template data is not present

[roggervalf]

Why

Enter your explanation here.

1. Why is this change necessary? Since version v5.31.0 template data is saved in job scheduler record, and since v5.34.8 this same data is used for saving the next delayed job that is produced by a job scheduler. If someone migrates to v5.34.8 or a greater version, without recreating their job scheduler, next delayed jobs won't get data information.

How

1. How did you implement this? Pass delayed job data when updating a job scheduler, if no data is saved as template, reuse data from previous delayed job

Additional Notes (Optional)

Any extra info here.
fixes #3009