Bug with exported metrics?

[garceri]

I'm checking the metrics that are exported to prometheus from solana_mc and noticed several of them have unusual labels that seem to include the metric value, this ends up cluttering the database, examples:

solana_confirmed_blocktime_diff{solana_confirmed_blocktime_diff="1666194086.00s"} 1.666194086e+09
solana_identity_account_balance{solana_identity_acc_bal="0.0000"} 0
solana_current_slot{solana_current_slot="156213954"} 1.56213954e+08
solana_block_time{solana_block_time="0.00s"} 0
solana_vote_account_balance{solana_vote_acc_bal="0.0317"} 0.031716522
solana_tx_count {solana_tx_count="1.07B"} 1.0704901002e+11

Is this a bug or a feature whose's purpose is not inmediately clear. I can submit a PR to fix this if you want.