Add missing prometheus metrics

[thaarok]

Fixes #218.
Add following prometheus metrics, used in Norma testing:

• chain_execution_nonresetting - because original chain_execution metrics is being reset regularly in the new ethereum, I am adding the original non-resetted metrics as a new metric.
• chain_info metrics added in the new ethereum made working by setting the chain_id into it

# TYPE chain_info gauge
chain_info {chain_id="4003"} 1

# TYPE chain_execution_count counter - is being reset to zero regularly with the new ethereum
chain_execution_count 1

# TYPE chain_execution summary - is being reset to zero regularly with the new ethereum
chain_execution {quantile="0.5"} 151768
chain_execution {quantile="0.75"} 151768
chain_execution {quantile="0.95"} 151768
chain_execution {quantile="0.99"} 151768
chain_execution {quantile="0.999"} 151768
chain_execution {quantile="0.9999"} 151768

# TYPE chain_execution_nonresetting_count counter - replacement of old chain_execution_count
chain_execution_nonresetting_count 9

# TYPE chain_execution_nonresetting summary - replacement of old chain_execution
chain_execution_nonresetting {quantile="0.5"} 138109
chain_execution_nonresetting {quantile="0.75"} 800485
chain_execution_nonresetting {quantile="0.95"} 2.499486e+06
chain_execution_nonresetting {quantile="0.99"} 2.499486e+06
chain_execution_nonresetting {quantile="0.999"} 2.499486e+06
chain_execution_nonresetting {quantile="0.9999"} 2.499486e+06

[rpl-ffl]

Thank you for the quick fix.

1. These changes help to fix Norma issue:

   • chain_execution -> chain_execution_nonreseting
   • chain_execution_count -> chain_execution_nonreseting_count

2. The change chain_info {} 1 -> chain_info {chain_id="4003"} 1 does not help to fix the Norma issue. Norma rigidly tries to parse the second element as so:

   quantileReg = regexp.MustCompile(`.*{quantile=".*"}`)
   

   For now we're circumventing this issue by ignoring any value with the name chain_info.