Black-ing and isort-ing the azure_functions_worker

[vrdmr]

Description

Cleaning up code by introducing Black and isort to the source. This is first of the series of PRs to move out of the setuptools to build.

Also to introduce structure in the code process. Some good example references:
wntrblm/nox#458

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PR information

• The title of the PR is clear and informative.
• There are a small number of commits, each of which has an informative message. This means that previously merged commits do not appear in the history of the PR. For information on cleaning up the commits in your pull request, see this page.
• If applicable, the PR references the bug/issue that it fixes in the description.
• New Unit tests were added for the changes made and CI is passing.

Quality of Code and Contribution Guidelines

• I have read the contribution guidelines.

[codecov]

Codecov Report

Merging #988 (2c68813) into dev (300cf00) will decrease coverage by 50.37%.
The diff coverage is 32.53%.

❗ Current head 2c68813 differs from pull request most recent head fee8fe2. Consider uploading reports for the commit fee8fe2 to get more accurate results

@@             Coverage Diff             @@
##              dev     #988       +/-   ##
===========================================
- Coverage   82.76%   32.39%   -50.38%     
===========================================
  Files          33       33               
  Lines        1677     1664       -13     
  Branches      267      267               
===========================================
- Hits         1388      539      -849     
- Misses        226     1124      +898     
+ Partials       63        1       -62     

Flag	Coverage Δ
unittests	32.39% <32.53%> (-50.38%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
azure_functions_worker/__main__.py	0.00% <ø> (ø)
azure_functions_worker/bindings/out.py	57.14% <ø> (-42.86%)	⬇️
...ed_memory_data_transfer/shared_memory_exception.py	66.66% <ø> (-33.34%)	⬇️
...red_memory_data_transfer/shared_memory_metadata.py	50.00% <ø> (-50.00%)	⬇️
azure_functions_worker/main.py	0.00% <0.00%> (ø)
azure_functions_worker/bindings/datumdef.py	18.62% <3.84%> (-45.10%)	⬇️
azure_functions_worker/functions.py	19.53% <10.52%> (-73.50%)	⬇️
azure_functions_worker/dispatcher.py	19.83% <14.54%> (-69.87%)	⬇️
azure_functions_worker/utils/dependency.py	33.08% <24.13%> (-57.15%)	⬇️
azure_functions_worker/bindings/generic.py	48.48% <28.57%> (-39.40%)	⬇️
... and 46 more

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