feat: task pagination

[Sciator]

Closes #614

Proposed Changes

added tasks_api.find_tasks_iter

Checklist

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

[Sciator]

Currently creates one more request than needed. Better identification of last page needed

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (2f9e5ed) 90.30% compared to head (ae2c18b) 90.35%.

Files	Patch %	Lines
influxdb_client/client/tasks_api.py	94.59%	2 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #616 +/- ## ========================================== + Coverage 90.30% 90.35% +0.04% ========================================== Files 39 39 Lines 3456 3493 +37 ========================================== + Hits 3121 3156 +35 - Misses 335 337 +2 ```

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