fix(ingest/glue): Profiling breaks for non-partitioned tables due to absent Table.PartitionKeys

[KulykDmytro]

Issue

While profiling glue table can face with issue:

  File "/home/airflow/.local/lib/python3.11/site-packages/datahub/ingestion/source/aws/glue.py", line 836, in get_profile_if_enabled
    partition_keys = response["Table"]["PartitionKeys"]
                     ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
KeyError: 'PartitionKeys'

this caused due to response for non-partitioned tables do not contain Table.PartitionKeys key

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

[hsheth2]

we can't use the := walrus operator since we need to maintain compatibility with python 3.7

[KulykDmytro]

got it will change