chore(ingest): drop python 3.6 support

[hsheth2]

Checklist

• [ ] The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• [ ] Links to related issues (if applicable)
• [ ] Tests for the changes have been added/updated (if applicable)
• [ ] Docs related to the changes have been added/updated (if applicable). If a new feature has been added a Usage Guide has been added for the same.
• [ ] For any breaking change/potential downtime/deprecation/big changes an entry has been made in Updating DataHub

[github-actions[bot]]

Unit Test Results (metadata ingestion)

       8 files  ±  0         8 suites  ±0   1h 13m 56s :stopwatch: +59s    642 tests  -   2     640 :heavy_check_mark:  -     1  2 :zzz:  -   1  0 :x: ±0  1 284 runs  +58  1 279 :heavy_check_mark: +104  5 :zzz:  - 46  0 :x: ±0 

Results for commit 32062570. ± Comparison against base commit d33eecba.

This pull request removes 2 tests.

tests.integration.iceberg.test_iceberg
tests.unit.test_iceberg

This pull request skips 1 test.

tests.integration.trino.test_trino ‑ test_trino_ingest

:recycle: This comment has been updated with latest results.

[github-actions[bot]]

Unit Test Results (build & test)

497 tests  ±0   497 :heavy_check_mark: ±0   8m 21s :stopwatch: -34s 115 suites ±0       0 :zzz: ±0  115 files   ±0       0 :x: ±0 

Results for commit 32062570. ± Comparison against base commit d33eecba.

:recycle: This comment has been updated with latest results.