maint(ctb): clean up Alias and Bytes tests

Cleans up the tests for AddressAliasHelper and Bytes, reformats to new
test format.

packages/contracts-bedrock/.gas-snapshot

@@ -9,13 +9,13 @@ GasBenchMark_L2OutputOracle:test_proposeL2Output_benchmark() (gas: 88513)
 GasBenchMark_OptimismPortal:test_depositTransaction_benchmark() (gas: 74998)
 GasBenchMark_OptimismPortal:test_depositTransaction_benchmark_1() (gas: 36156)
 GasBenchMark_OptimismPortal:test_proveWithdrawalTransaction_benchmark() (gas: 167187)
-Bytes_Test:test_slice_acrossMultipleWords_works() (gas: 9391)
-Bytes_Test:test_slice_acrossWords_works() (gas: 1397)
-Bytes_Test:test_slice_fromNonZeroIdx_works() (gas: 17218)
-Bytes_Test:test_slice_fromZeroIdx_works() (gas: 20826)
-Bytes_Test:test_toNibbles_expectedResult128Bytes_works() (gas: 129885)
-Bytes_Test:test_toNibbles_expectedResult5Bytes_works() (gas: 6132)
-Bytes_Test:test_toNibbles_zeroLengthInput_works() (gas: 966)
+Bytes_slice_Test:test_slice_acrossMultipleWords_works() (gas: 9357)
+Bytes_slice_Test:test_slice_acrossWords_works() (gas: 1396)
+Bytes_slice_Test:test_slice_fromNonZeroIdx_works() (gas: 17154)
+Bytes_slice_Test:test_slice_fromZeroIdx_works() (gas: 20671)
+Bytes_toNibbles_Test:test_toNibbles_expectedResult128Bytes_works() (gas: 129830)
+Bytes_toNibbles_Test:test_toNibbles_expectedResult5Bytes_works() (gas: 6088)
+Bytes_toNibbles_Test:test_toNibbles_zeroLengthInput_works() (gas: 944)
 CrossDomainMessenger_BaseGas_Test:test_baseGas_succeeds() (gas: 20120)
 CrossDomainOwnableThroughPortal_Test:test_depositTransaction_crossDomainOwner_succeeds() (gas: 61882)
 CrossDomainOwnable_Test:test_onlyOwner_notOwner_reverts() (gas: 10530)

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

@@ -4,7 +4,10 @@ pragma solidity 0.8.15;
 import { Test } from "forge-std/Test.sol";
 import { AddressAliasHelper } from "../vendor/AddressAliasHelper.sol";
 
-contract AddressAliasHelper_Test is Test {
+contract AddressAliasHelper_applyAndUndo_Test is Test {
+    /**
+     * @notice Tests that applying and then undoing an alias results in the original address.
+     */
     function testFuzz_applyAndUndo_succeeds(address _address) external {
         address aliased = AddressAliasHelper.applyL1ToL2Alias(_address);
         address unaliased = AddressAliasHelper.undoL1ToL2Alias(aliased);