Add giveup_early to get_package_version functions

[hmstepanek]

Overview

Add giveup_early to get_package_version functions and only get version once at import time.

Related Github Issue

This is a fix for #817.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	bandit	4		0	5.9s
✅ PYTHON	black	4	0	0	0.88s
✅ PYTHON	flake8	4		0	0.52s
✅ PYTHON	isort	4	0	0	0.24s
✅ PYTHON	pylint	4		0	3.43s

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[codecov-commenter]

Codecov Report

Merging #868 (4d4db82) into main (6644846) will decrease coverage by 0.03%.
The diff coverage is 90.00%.

@@            Coverage Diff             @@
##             main     #868      +/-   ##
==========================================
- Coverage   81.13%   81.11%   -0.03%     
==========================================
  Files         183      183              
  Lines       18251    18255       +4     
  Branches     3160     3161       +1     
==========================================
- Hits        14808    14807       -1     
- Misses       2585     2588       +3     
- Partials      858      860       +2     

Impacted Files	Coverage Δ
newrelic/hooks/datastore_aioredis.py	58.49% <66.66%> (ø)
newrelic/common/package_version_utils.py	97.87% <100.00%> (+0.09%)	⬆️

... and 4 files with indirect coverage changes

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