K8s sitecustomize changes

[TimPansino]

Overview

• Add section to sitecustomize to support initializing using the K8s agents operator.
• Refactor sitecustomize logic to fix several crashes and inconsistencies around imports.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	bandit	1		0	4.9s
✅ PYTHON	black	1	0	0	0.72s
✅ PYTHON	flake8	1		0	0.4s
✅ PYTHON	isort	1	0	0	0.28s
✅ PYTHON	pylint	1		0	2.55s

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 37 lines in your changes are missing coverage. Please review.

Please upload report for BASE (develop-k8s-agent-operator@185f6f9). Learn more about missing BASE report.

Files	Patch %	Lines
newrelic/bootstrap/sitecustomize.py	0.00%	37 Missing ⚠️

Additional details and impacted files

@@                      Coverage Diff                      @@
##             develop-k8s-agent-operator    #1144   +/-   ##
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  Coverage                              ?   79.82%           
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  Files                                 ?      192           
  Lines                                 ?    21323           
  Branches                              ?     3707           
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  Hits                                  ?    17021           
  Misses                                ?     3242           
  Partials                              ?     1060           

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[hmstepanek]

The tests are failing but it's some unrelated issue with langchain.