cset bake over a range of times

[jfrost-mo]

What problem does your feature request solve?

When manyally running cset bake it is hard to test a sequence of time points, as you cannot specify multiple values for VALIDITY_TIME.

Describe the solution you'd like

It would be nice if you can specify a range, maybe with some syntax like:

--VALIDITY_TIME="20000101T0000Z..20000101T1200Z"

Describe alternatives you've considered

It would be possible instead to run a bunch of recipes in parallel only mode, then collate them, but this is essentially what the workflow already does.

[jfrost-mo]

This is a fairly niche use case that only affects time series. For most plots you can get away with a single time step, and it is possible to construct a recipe that does not constrain on validity time. As implementing this would require going a good way towards a workflow engine, it seems more complicated that it is worth at this moment. Maybe some day however.

[jfrost-mo]

This is no longer an issue after #765.