perf: Prefer datetime.fromisoformat over dateutil.parse in Python 3.11+

[n-thumann]

Proposed Changes

This PR changes the behavior of get_date_helper to prefer datetime.datetime.fromisoformat over dateutil.parser in Python 3.11 or higher.
According to https://github.com/closeio/ciso8601/blob/b17984f5b4c6db0ef596b4d31456c8a39ae278ee/why_ciso8601.md, Since Python 3.11+, the performance of cPython's datetime.fromisoformat is now very good. I did some quick testing and it seems to be on a par with ciso8601:
On Python 3.10 I've got ~37,5s and ~3,5s without and with ciso8601 installed, respectively. On Python 3.11 I've got ~2,5s and ~2,6s without and with ciso8601 installed, respectively.

Because ciso is no dependency, but an extra, not all users (including me) installed it. With this PR these users will get a better out-of-the-box performance for Python 3.11+ users.

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• pytest tests completes successfully
• Commit messages are conventional
• Sign CLA (if not already signed)

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 90.40%. Comparing base (d2393e0) to head (b97b611).
Report is 9 commits behind head on master.

Files	Patch %	Lines
influxdb_client/client/util/date_utils.py	75.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #657      +/-   ##
==========================================
- Coverage   90.42%   90.40%   -0.03%     
==========================================
  Files          39       39              
  Lines        3510     3513       +3     
==========================================
+ Hits         3174     3176       +2     
- Misses        336      337       +1     

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[bednar]

@n-thumann, thank you for your fantastic PR! 👍

LGTM 🚀