Update Database with validators report

[davidgamez]

Describe the problem

As part of the Datasets metadata, we would like to include a summary of the information produced by the GTFS validator. This issue implements the update of the MobilityData Database after a validation report is generated.

Depends on #228

Proposed solution

After #228 is implemented, a validation report is generated and copied to the target GCP bucket. Using Eventarc trigger.

Alternatives you've considered

No response

Additional context

No response

[cka-y]

Tasks:

• Use Eventarc to trigger Cloud Function when report is uploaded
• Populate database report related entities (features, notices, validation report entity)