job_status: Convert datetime objects into formatted strings

[bdrung]

salt-call schedule.job_status will return empty values for the datetime.datetime objects. So convert the datetime.datetime objects into formatted strings. Then they will be shown correctly:

$ sudo salt-call schedule.job_status __mine_interval
local:
    ----------
    _last_run:
        2021-11-01T12:36:57
    _next_fire_time:
        2021-11-01T13:36:57
    _next_scheduled_fire_time:
        2021-11-01T13:36:57
    _run_on_start:
        False
    _seconds:
        3600
    _splay:
        None
    enabled:
        True
    function:
        mine.update
    jid_include:
        True
    maxrunning:
        2
    minutes:
        60
    name:
        __mine_interval
    return_job:
        False
    run:
        True
    run_on_start:
        True
    splay:
        None

[Ch3LL]

this will require a changelog and test coverage.

[bdrung]

Added a changelog and enhanced test_job_status to cover this change.

[bdrung]

Just rebased on master

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---

Thanks again!

[Ch3LL]

Can you rebase again, Fedora 35 was removed form the pipelines until we can take the time to fix all the tests.

[bdrung]

Rebased.