test(pulse-scheduler): add gas benchmark (#2596)

* test(pulse-scheduler): add gas benchmark, refactor common helpers into util

* doc: test comment

* fix: import

* fix: overflow, DRY

* doc: comment

* fix: remove unused constants

Author: tejasbadadare

Diff for: target_chains/ethereum/contracts/contracts/pulse/scheduler/Scheduler.sol

@@ -671,8 +671,9 @@ abstract contract Scheduler is IScheduler, SchedulerState {
     function getMinimumBalance(
         uint8 numPriceFeeds
     ) external pure override returns (uint256 minimumBalanceInWei) {
-        // Simple implementation - minimum balance is 0.01 ETH per price feed
-        return numPriceFeeds * 0.01 ether;
+        // Placeholder implementation
+        // TODO: make this governable
+        return uint256(numPriceFeeds) * 0.01 ether;
     }
 
     // ACCESS CONTROL MODIFIERS