Gas consumption profiling

[ETatuzova]

1. We need measure gas consumption separately for each test. Now hardhat-gas-reporter allows access only to maximum, minimum and average gasUsage value threw all TestPlaceholderVerifierl.verify calls.
2. We need a good way to measure and output gas consumption for different placeholder parts, such as "gate argument", "permutation argument", "lpc verification" e t.c.

[hgedia]

For finer control over gas profiling we can use hardhat - console.log to output gasLeft() on calls.
Since we do not wish to push console.logs to production, we can evaluate either of the two approaches.

1. Use a hardhat plugin such as pre-processor to remove logs before push to production. Commit all profiling on main
2. Maintain a new branch which has profiling enabled via logs by default.