configure tox with dynamic resolution

[kptkin]

Description

What does the PR do?

Follow up to tie some loose ends from this PR: #4136
This PR, cleans up the configuration file and makes the tox command more generic - do we want to format the entire folder?

This PR also re-enables the pre-commit hooks

Testing

How was this PR tested?

This is just formatting, hence expecting test to pass as a sign that all worked correctly!

[codecov]

Codecov Report

Merging #4138 (3d67ff5) into master (486cc58) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4138      +/-   ##
==========================================
+ Coverage   82.70%   82.71%   +0.01%     
==========================================
  Files         256      256              
  Lines       32534    32534              
==========================================
+ Hits        26906    26912       +6     
+ Misses       5628     5622       -6     

Flag	Coverage Δ
functest	54.99% <ø> (ø)
unittest	73.47% <ø> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
wandb/agents/pyagent.py	70.80% <0.00%> (-1.61%)	⬇️
wandb/sdk/lib/sock_client.py	92.59% <0.00%> (-1.06%)	⬇️
wandb/sdk/lib/git.py	79.01% <0.00%> (ø)
wandb/sdk/wandb_run.py	91.16% <0.00%> (+0.24%)	⬆️
wandb/filesync/step_prepare.py	94.93% <0.00%> (+1.26%)	⬆️
wandb/integration/tensorboard/monkeypatch.py	90.12% <0.00%> (+2.46%)	⬆️
wandb/sdk/internal/meta.py	90.79% <0.00%> (+3.06%)	⬆️

[dmitryduev]

While you're at it...mind fixing the pre-commit hook as well?

[dmitryduev]

♨️