test: Fix import paths

Author: 0xhiroshi

test/mock/MockBlastERC20.sol

@@ -3,7 +3,7 @@ pragma solidity 0.8.23;
 
 import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
 
-import {YieldMode} from "../../../contracts/interfaces/IERC20Rebasing.sol";
+import {YieldMode} from "../../contracts/interfaces/IERC20Rebasing.sol";
 
 contract MockBlastERC20 is ERC20 {
     mapping(address _contract => YieldMode) public yieldMode;

test/mock/MockBlastWETH.sol

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.20;
 
-import {YieldMode} from "../../../contracts/interfaces/IERC20Rebasing.sol";
+import {YieldMode} from "../../contracts/interfaces/IERC20Rebasing.sol";
 
 contract MockBlastWETH {
     string public name = "Wrapped Ether";

test/mock/MockBlastYield.sol

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.20;
 
-import {YieldMode, GasMode} from "../../../contracts/interfaces/IBlast.sol";
+import {YieldMode, GasMode} from "../../contracts/interfaces/IBlast.sol";
 
 contract MockBlastYield {
     struct Config {