A simple contract that acts as a go between for transactions to change the msg.sender for testing (in solidity based tests)

ChangeSender.sol

// SPDX-License-Identifier: MIT
pragma solidity >=0.7.0 <0.9.0;

// A simple contract that acts as a go between for transactions to change the msg.sender for testing (in solidity based tests)
contract ChangeSender {
    function call(address to, bytes4 functionSignature, bytes memory data) public returns(bool success, bytes memory result) {
        (success, result) = to.call(abi.encode(functionSignature, data));
    }
}