Fix #15454: Added protobuf parser complex schema support

[OnkarVO7]

Describe your changes:

Fixes https://github.com/open-metadata/OpenMetadata/issues/15454

Type of change:

• [ ] Bug fix
• [x] Improvement
• [ ] New feature
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation

Checklist:

• [x] I have read the CONTRIBUTING document.
• [ ] My PR title is Fixes <issue-number>: <short explanation>
• [ ] I have commented on my code, particularly in hard-to-understand areas.
• [ ] For JSON Schema changes: I updated the migration scripts or explained why it is not needed.

[sonarqubecloud[bot]]

Quality Gate failed for 'open-metadata-ingestion'

Failed conditions
E Security Review Rating on New Code (required ≥ A)

See analysis details on SonarCloud