contracts-bedrock: Predeploys assertion update (#8930)

We want to delete `check-l2` to reduce the overhead of contributing
to the solidity code. We are nearly there, we just need to ensure
that the same checks in `check-l2` exist in the predeploys spec
and the rest of the individual unit tests since now the unit
tests run against the output of the genesis generation script.

packages/contracts-bedrock/test/Predeploys.t.sol

@@ -26,7 +26,7 @@ contract PredeploysTest is CommonTest {
             ) {
                 continue;
             }
-            assertTrue(EIP1967Helper.getAdmin(addr) == Predeploys.PROXY_ADMIN, "Admin mismatch");
+            assertEq(EIP1967Helper.getAdmin(addr), Predeploys.PROXY_ADMIN, "Admin mismatch");
         }
     }
 }