Fix Celery Instrumentation for Workers

[TimPansino]

Overview

• Celery apps run with worker optimizations would overwrite instrumentation wrappers.
• This has been corrected by instrumenting the setup and reset methods to always ensure our wrapper is always applied, is never duplicated, and is always the top wrapper for BaseTask.call
• Add new tests file for wrapper unit tests with new test for worker optimizations.
• Run task method tests with and without worker optimizations.
• Fix bug in @validate_transaction_count where state from previous tests is never cleared.

[github-actions]

🦙 MegaLinter status: ❌ ERROR

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	bandit	2		0	5.55s
✅ PYTHON	black	5	3	0	2.09s
❌ PYTHON	flake8	5		3	1.07s
✅ PYTHON	isort	5	4	0	0.31s
✅ PYTHON	pylint	5		0	6.55s

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 71.42857% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 81.71%. Comparing base (df2b159) to head (2a88b39).

Files	Patch %	Lines
newrelic/hooks/application_celery.py	70.37%	3 Missing and 5 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1133      +/-   ##
==========================================
- Coverage   81.74%   81.71%   -0.03%     
==========================================
  Files         192      192              
  Lines       21304    21323      +19     
  Branches     3706     3710       +4     
==========================================
+ Hits        17415    17425      +10     
- Misses       2813     2819       +6     
- Partials     1076     1079       +3     

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