feat(data_frame): add possibility to specify timestamp column

[bednar]

Closes #438

Proposed Changes

• Specify column with timestamp
• Use string column for timestamp
• Specify timezone for timestamp

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]

Codecov Report

Merging #440 (8037c0c) into master (8543469) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #440      +/-   ##
==========================================
+ Coverage   89.30%   89.35%   +0.04%     
==========================================
  Files          38       38              
  Lines        3245     3259      +14     
==========================================
+ Hits         2898     2912      +14     
  Misses        347      347              

Impacted Files	Coverage Δ
influxdb_client/client/write_api.py	99.01% <ø> (ø)
influxdb_client/client/write_api_async.py	100.00% <ø> (ø)
...fluxdb_client/client/write/dataframe_serializer.py	98.26% <100.00%> (+0.24%)	⬆️

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