Reduce noise in test output

packages/hardhat-core/test/fixture-projects/consistent-build-info-names/contracts/A.sol

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: UNLICENSED
 pragma solidity ^0.7.0;
 
 import "dependency/contracts/Dep1.sol";

packages/hardhat-core/test/fixture-projects/consistent-build-info-names/contracts/B.sol

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: UNLICENSED
 pragma solidity ^0.7.0;
 
 import "dependency/contracts/Dep1.sol";

packages/hardhat-core/test/fixture-projects/consistent-build-info-names/hardhat.config.js

@@ -1,3 +1,7 @@
+// This project is compiled from scratch multiple times in the same test, which
+// produces a lot of logs. We override this task to omit those logs.
+subtask("compile:solidity:log:compilation-result", () => {});
+
 module.exports = {
   solidity: "0.7.3",
 };

packages/hardhat-core/test/fixture-projects/project-with-scripts/contracts/a.sol

@@ -1,2 +1,3 @@
+pragma solidity ^0.5.0;
 contract A {}