Performance updates

[JoshCu]

Tidies up and adds several performance enhancements:
It should be possible to cherry-pick any of the commits to pick and choose what changes to keep.

full details of original testing: ngen init speedup troute speedup parallel processing speedup

• Adds new optional realization parameter write_catchment_outputs which allows you to disable the individual catchment csv files, useful for calibration and reducing the number of files produced running over large areas
• Replaced the mpi barriers with manual wait loops that poll every 100ms to reduce cpu useage, allowing troute to use the full cpu
• Adds an option to disable netcdf forcing cache, speedup for running in parallel
• Adds script to create partitions with no remotes (no mpi communication), speedup for running in parallel
• Refactors the forcing file finding to speed up the ngen init portion of the ngen run

Tested in ngiab with additional the script added for the alternative partitioning, url here.

Note

The partitioning script is currently just a python script that only works with geopackage input. When I get it properly incorporated into the existing partition generator I will update this PR.