Instrument s3transfer BoundExecutor submit function.

[umaannamalai]

This PR instruments the Instrument s3transfer BoundExecutor submit function. This supports context propagation so that the agent is able to instrument upload_file in boto3.

Closes #1178.

[github-actions]

🦙 MegaLinter status: ❌ ERROR

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	bandit	2		0	5.32s
✅ PYTHON	black	4	0	0	1.73s
❌ PYTHON	flake8	4		2	0.99s
✅ PYTHON	isort	4	1	0	0.37s
✅ PYTHON	pylint	4		0	6.5s

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Codecov Report

Attention: Patch coverage is 80.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 81.63%. Comparing base (772adec) to head (8d0c705).
Report is 2 commits behind head on main.

Files	Patch %	Lines
newrelic/hooks/external_s3transfer.py	78.57%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1185      +/-   ##
==========================================
+ Coverage   81.40%   81.63%   +0.23%     
==========================================
  Files         196      197       +1     
  Lines       21735    21750      +15     
  Branches     3795     3797       +2     
==========================================
+ Hits        17693    17756      +63     
+ Misses       2937     2889      -48     
  Partials     1105     1105              

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