add pre-commit hook to run pylint on tests passing pylint

[timmysilv]

Context:
pre-commit helps catch failures before they happen on CI. CI will fail if an already-whitelisted test isn't passing pylint.

Description of the Change:
Run pylint on whitelisted tests.

Benefits:
Less CI failures, faster development process.

Possible Drawbacks:

• I had to write it using a bash entrypoint because the pylint entrypoint doesn't support custom file lists evaluated in a sub-shell like I have done here.
• Users might not expect to see this new pre-commit hook (imo this is no biggie - if you installed the pre-commit hook yourself, you can probably figure out this mystery!)

[github-actions]

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Please edit doc/releases/changelog-dev.md with:

• A one-to-two sentence description of the change. You may include a small working example for new features.
• A link back to this PR.
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[codecov]

Codecov Report

Merging #3621 (5fef0e6) into master (efe3c07) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3621      +/-   ##
==========================================
- Coverage   99.86%   99.86%   -0.01%     
==========================================
  Files         313      313              
  Lines       28097    28095       -2     
==========================================
- Hits        28060    28058       -2     
  Misses         37       37              

Impacted Files	Coverage Δ
pennylane/math/is_independent.py	100.00% <100.00%> (ø)
pennylane/qchem/hartree_fock.py	100.00% <100.00%> (ø)
pennylane/templates/layers/random.py	100.00% <100.00%> (ø)
pennylane/wires.py	100.00% <100.00%> (ø)

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[apotapov]

[albi3ro]

👍