Switch for automatic deletion of time series parquet files

[rHorsey]

Is your feature request related to a problem? Please describe.
This bit of code in the postprocessing doesn't have a switch on it and we really really truly need these parquet files for vizstock in particular. The aggregated timeseries files that can be produced from them are useless to us at this point for production runs of ComStock, and soon ResStock.

Describe the solution you'd like
A flag to disable this behavior.

Describe alternatives you've considered
Making the flag default to not clean up, but I think that's not really reasonable...

Additional context
I've spend over 160 hours 'fixing' this for the V1 ComStock run by re-processing over a PB of double-zipped data. I look forward to never doing this ever again.

[nmerket]

This "fix" seems easy enough, but I'd be interested to understand better what you're trying to do first to see if there's a better way to address the issue.

And, yeah, we really should fix that double zip nightmare.

[asparke2]

@rHorsey I believe that this feature was added via: #212, specifically in these lines of code: https://github.com/NREL/buildstockbatch/pull/212/files#diff-828ab8165bda69957bd58e587d7e6109e847c37d42105953613f25855bf65be9R787-R791

Documentation is under keep_intermediate_files here : https://buildstockbatch.readthedocs.io/en/latest/project_defn.html#eagle-configuration