Celery Instrumentation Cleanup

[TimPansino]

Overview

• Remove unnecessary instrumentation for Celery's build_tracer() function by patching compatibility with Celery's monkey-patching detection.
• Add tests for all methods of running or enqueueing tasks in Celery.
• Add additional logic for transaction naming for tasks run under map or starmap
• Remove unused code and comments.

[github-actions[bot]]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	bandit	2		0	5.39s
✅ PYTHON	black	8	0	0	2.16s
✅ PYTHON	flake8	8		0	1.09s
✅ PYTHON	isort	8	0	0	0.36s
✅ PYTHON	pylint	8		0	6.27s

See detailed report in MegaLinter reports _Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff_

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 72.41379% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 81.74%. Comparing base (3b46fad) to head (399f6da).

Files	Patch %	Lines
newrelic/hooks/application_celery.py	72.41%	6 Missing and 2 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1128 +/- ## ========================================== - Coverage 81.77% 81.74% -0.04% ========================================== Files 192 192 Lines 21303 21300 -3 Branches 3707 3706 -1 ========================================== - Hits 17420 17411 -9 - Misses 2806 2813 +7 + Partials 1077 1076 -1 ```

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