Setting pythonpath for all environments

[gavin-aguiar]

Description

Setting pythonpath to add customer dependencies for all environments. This change would resolve issues with custom containers using custom libraries.

Fixes #

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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[bot]]

Codecov Report

Merging #1180 (8f68a10) into dev (840a894) will decrease coverage by 53.00%. The diff coverage is n/a.

:exclamation: Current head 8f68a10 differs from pull request most recent head 2fad546. Consider uploading reports for the commit 2fad546 to get more accurate results

@@             Coverage Diff             @@
##              dev    #1180       +/-   ##
===========================================
- Coverage   84.91%   31.92%   -53.00%     
===========================================
  Files          34       34               
  Lines        1889     1889               
  Branches      363      363               
===========================================
- Hits         1604      603     -1001     
- Misses        220     1285     +1065     
+ Partials       65        1       -64     

Flag	Coverage Δ
unittests	31.92% <ø> (-52.94%)	:arrow_down:

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

Impacted Files	Coverage Δ
...e_functions_worker/bindings/nullable_converters.py	21.62% <0.00%> (-78.38%)	:arrow_down:
azure_functions_worker/functions.py	25.00% <0.00%> (-71.28%)	:arrow_down:
.../shared_memory_data_transfer/file_accessor_unix.py	19.60% <0.00%> (-69.61%)	:arrow_down:
azure_functions_worker/dispatcher.py	19.74% <0.00%> (-69.24%)	:arrow_down:
azure_functions_worker/utils/tracing.py	31.81% <0.00%> (-68.19%)	:arrow_down:
azure_functions_worker/utils/common.py	33.33% <0.00%> (-66.67%)	:arrow_down:
azure_functions_worker/bindings/meta.py	25.30% <0.00%> (-57.84%)	:arrow_down:
...ared_memory_data_transfer/shared_memory_manager.py	26.80% <0.00%> (-55.68%)	:arrow_down:
...s/shared_memory_data_transfer/shared_memory_map.py	28.57% <0.00%> (-55.36%)	:arrow_down:
azure_functions_worker/bindings/datumdef.py	20.13% <0.00%> (-54.17%)	:arrow_down:
... and 14 more

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