Add dummy tags and domain values

[Harshit28j]

This PR resolves Cloud-CV/EvalAI#4329
#90

[Harshit28j]

I took the dummy values by examining challenges

[RishabhJain2018]

Thanks, @Harshit28j for the quick PR.

@gautamjajoo Can you please help in reviewing this?

[RishabhJain2018]

@Harshit28j Can you also check and find out what other fields are missing in this challenge_config.yaml?

[Harshit28j]

@Harshit28j Can you also check and find out what other fields are missing in this challenge_config.yaml?

Sure, I can. Just to confirm, would you like me to include only the essential key mappings?

Like For Instance:

• In the leaderboard: (score, last submission)
• In challenge phase: (is_active)
• In challenge phase splits: (show_leaderboard_by_latest_submissions, show_execution_time)

or do you want me to add all other key mappings?