Copy circuit: add statistic method to get copy rows per gas info.

[DreamWuGit]

Describe the feature you would like

add a similar statistic method for copy , like method get_evm_states_stats in https://github.com/scroll-tech/zkevm-circuits/blob/develop/zkevm-circuits/src/evm_circuit.rs#L649L650, and put all copy related code into testing， run once can get clear of each one rows cost per gas. currently we did it manually and randomly ... less efficient

Additional context

No response