feat: DeleteApi uses default value from InfluxDBClient.org if org parameter is not specified

[bednar]

Related to https://influxcommunity.slack.com/archives/CHQ5VG6F8/p1645606126853649

Proposed Changes

DeleteApi uses default value from InfluxDBClient.org if org parameter is not specified.

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 #412 (ee64a47) into master (892c774) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #412   +/-   ##
=======================================
  Coverage   93.25%   93.26%           
=======================================
  Files          28       28           
  Lines        2506     2509    +3     
=======================================
+ Hits         2337     2340    +3     
  Misses        169      169           

Impacted Files	Coverage Δ
influxdb_client/client/bucket_api.py	94.44% <ø> (ø)
influxdb_client/client/influxdb_client.py	97.81% <ø> (ø)
influxdb_client/client/query_api.py	98.31% <ø> (ø)
influxdb_client/client/write_api.py	99.17% <ø> (ø)
influxdb_client/client/delete_api.py	100.00% <100.00%> (ø)

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