fix(feature_store): safely parse bq:// URIs using removeprefix

[mrishi]

Description:
Fixed a bug in fetch_historical_feature_values where bq_uri.lstrip("bq://") was greedily stripping valid characters (such as 'b' or 'q') from the beginning of Google Cloud Project IDs.

Replaced lstrip with removeprefix to safely and explicitly remove only the protocol string without inadvertently mutating the project ID.

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[matthew29tang]

Can you sign the CLA?

[mrishi]

Can you sign the CLA?

Thanks, I had already signed the CLA. A re-scan was pending. Done now.

[matthew29tang]

Thanks, it looks like we lstrip bq in a few other places. Could you also make the change for those files?

aiplatform/preview/datasets.py

agentplatform/resources/preview/feature_store/offline_store.py

[mrishi]

Thanks, it looks like we lstrip bq in a few other places. Could you also make the change for those files?

aiplatform/preview/datasets.py

agentplatform/resources/preview/feature_store/offline_store.py

Done