feat(ingestion/kafka): add option to add sample values

[acrylJonny]

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

[codecov]

Codecov Report

Attention: Patch coverage is 29.87421% with 223 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...estion/src/datahub/ingestion/source/kafka/kafka.py	29.87%	223 Missing ⚠️

Files with missing lines	Coverage Δ
...estion/src/datahub/ingestion/source/kafka/kafka.py	58.28% <29.87%> (-35.75%)	⬇️

... and 32 files with indirect coverage changes

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