Enable `Performance/DeletePrefix` and `Performance/DeleteSuffix` cops
Enable `Performance/DeletePrefix` and `Performance/DeleteSuffix` cops

Follow up to rails/rails#39409.

This PR enables `Performance/DeletePrefix` and `Performance/DeleteSuffix` cops.

rshell/oracle-enhanced,rsim/oracle-enhanced,yahonda/oracle-enhanced,rsim/oracle-enhanced,yahonda/oracle-enhanced,rshell/oracle-enhanced