Revert unintentional changes

Author: simolus3

dart/test/utils/native_test_utils.dart

@@ -14,8 +14,7 @@ CommonDatabase openTestDatabase() {
     return DynamicLibrary.open('libsqlite3.so.0');
   });
   sqlite_open.open.overrideFor(sqlite_open.OperatingSystem.macOS, () {
-    return DynamicLibrary.open(
-        '/opt/homebrew/Cellar/sqlite/3.48.0/lib/libsqlite3.dylib');
+    return DynamicLibrary.open('libsqlite3.dylib');
   });
   var lib = DynamicLibrary.open(getLibraryForPlatform(path: libPath));
   var extension = SqliteExtension.inLibrary(lib, 'sqlite3_powersync_init');
@@ -24,6 +23,8 @@ CommonDatabase openTestDatabase() {
 }
 
 String getLibraryForPlatform({String? path = "."}) {
+  // Using an absolute path is required for macOS, where Dart can't dlopen
+  // relative paths due to being a "hardened program".
   return p.normalize(p.absolute(switch (Abi.current()) {
     Abi.androidArm ||
     Abi.androidArm64 ||