added goldens

[Ashwani725]

Jobs ran successfully. Added Golden Checks.
Files added are : golden_data/, manifest.json, validation_config.json

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[gemini-code-assist]

Code Review

This pull request introduces validation configuration and golden data files for the India NDAP Life Expectancy import. Specifically, it adds validation_config.json with rules for deleted records percentage and golden data checks, updates manifest.json to reference this configuration, and provides the corresponding golden observation and summary report CSV files. Feedback is provided regarding the Wikidata ID used for Delhi in the golden observations, which should be updated to Q9357528 instead of Q1353 to match the repository's mapping rules for Indian administrative data at the AA1 level.