Fixed dbt Manifest and Run results parsing

[SumanMaharana]

Describe your changes:

Fixed dbt Manifest and Run results parsing

Type of change:

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

Checklist:

• 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.

[TeddyCr]

@SumanMaharana here we should probably check manifest_dict.get(... returns a dict and is not Null -- we can also update the method signature def remove_manifest_non_required_keys(self, manifest_dict: dict): if we are expecting indeed a Dict[str, dict].

Otherwise we'll get

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'str' object has no attribute 'items'

or

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'NoneType' object has no attribute 'items'

[SumanMaharana]

@TeddyCr manifest_dict.get(... will always return a dict as its defined that way in dbt.

[sonarqubecloud]

Quality Gate passed for 'open-metadata-ingestion'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
34.8% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud