Add positive output to the verify-bytecodes script

[m-chrzan]

Description

Previously the script would just exit with code 0 and no stdout output about success. Added logs reporting which contracts have been checked and at which address on the network.

Other changes

getImplementationAddress was previously returning pre-release 1 library addresses without a "0x" prefix, fixed this for consistency in logs.

Improved the documentation comment in verify-bytecodes.ts.

Tested

yarn verify-bytecodes -b rc1 -n rc1 -r -f succeeds outputs the new logs.

Related issues

• Part of Conduct contract release 1 #4812

Backwards compatibility

Only cosmetic script change.

[ewilz]

Do we need to add the same flag inside verify-release.sh as well, or is that different?
In thinking about suppressing the logs for these scripts I was thinking of adding an optional --verbose flag. would having both --quiet and --verbose be confusing?