fix(forge lint): gas lints

[0xrusowsky]

closes: #10663

Motivation

• disable gas-related lints for test and script files
• reduce the amount of false positives for keccak256

Solution

previously, any time keccak256 was used, it would be flag as an unoptimized usage.

with this change, those hashes which simply hash a single literal (i.e. keccak256("hello") or keccak256(1234)) won't be flagged, as the compiler should inline its hash.

[grandizzy]

This makes sense, one comment re the way scripts / tests are identified, IMO can better use ProjectPathsConfig helpers and pass the type of the file down to linter

[grandizzy]

lgtm!