feat(write): add support for callback notification for batching mode

[bednar]

Proposed Changes

1. Added support for define callbacks for hook to batches events.
2. Added an example how to use callbacks.
3. Added docs about error handling.

Checklist

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

[codecov-commenter]

Codecov Report

Merging #341 (5607e87) into master (76bdb62) will increase coverage by 0.11%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #341      +/-   ##
==========================================
+ Coverage   92.63%   92.75%   +0.11%     
==========================================
  Files          27       27              
  Lines        2254     2276      +22     
==========================================
+ Hits         2088     2111      +23     
+ Misses        166      165       -1     

Impacted Files	Coverage Δ
influxdb_client/client/__init__.py	100.00% <100.00%> (ø)
influxdb_client/client/influxdb_client.py	98.13% <100.00%> (ø)
influxdb_client/client/write/__init__.py	100.00% <100.00%> (ø)
influxdb_client/client/write/retry.py	100.00% <100.00%> (ø)
influxdb_client/client/write_api.py	99.17% <100.00%> (+0.04%)	⬆️
influxdb_client/rest.py	85.18% <100.00%> (+0.97%)	⬆️

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