Move more shared code into DockerBatchBase

[nweires]

Pull Request Description

Moves two more sections of code into the parent class to be shared by the AWS and GCP implementations, and adds tests for them. Both are part of the tasks on the cloud that run the building simulations.

• get_epws_to_download determines which weather files are needed by a particular batch of simulations.
• run_simulations runs Openstudio, writes the results to the output bucket, and cleans up any intermediate files.

This is purely refactoring and does not change any behavior.

Checklist

Not all may apply

• [x] Code changes (must work)
• [x] Tests exercising your feature/bug fix (check coverage report on Checks -> BuildStockBatch Tests -> Artifacts)
• [x] Coverage has increased or at least not decreased. Update minimum_coverage in .github/workflows/coverage.yml as necessary.
• [x] All other unit and integration tests passing
• [ ] Update validation for project config yaml file changes
• [ ] Update existing documentation
• [ ] Run a small batch run on Kestrel/Eagle to make sure it all works if you made changes that will affect Kestrel/Eagle
• [x] Add to the changelog_dev.rst file and propose migration text in the pull request

[github-actions[bot]]

File	Coverage
All files	86%	:white_check_mark:
base.py	90%	:white_check_mark:
exc.py	57%	:white_check_mark:
hpc.py	78%	:white_check_mark:
local.py	70%	:white_check_mark:
postprocessing.py	84%	:white_check_mark:
utils.py	91%	:white_check_mark:
cloud/docker_base.py	92%	:white_check_mark:
sampler/base.py	79%	:white_check_mark:
sampler/downselect.py	33%	:white_check_mark:
sampler/precomputed.py	93%	:white_check_mark:
sampler/residential_quota.py	61%	:white_check_mark:
test/shared_testing_stuff.py	85%	:white_check_mark:
test/test_docker.py	33%	:white_check_mark:
test/test_validation.py	97%	:white_check_mark:
workflow_generator/base.py	90%	:white_check_mark:
workflow_generator/commercial.py	53%	:white_check_mark:
workflow_generator/residential_hpxml.py	86%	:white_check_mark:

Minimum allowed coverage is 33%

Generated by :monkey: cobertura-action against d826e518d466722b170abded6a00e3e08bfcfe44

[nweires]

Seems good to me too. Like I said in the other PR, I'd prefer having something in the changelog to track these changes.

Sure - just added an update to changelog_dev.rst.