Fix the name of the local-engine-host flag in the warning message (#132808)

packages/flutter_tools/lib/src/base/user_messages.dart

@@ -310,7 +310,7 @@ class UserMessages {
       'You must specify --local-engine or --local-web-sdk if you are using a locally built engine or web sdk.';
   // TODO(matanlurey): Make this an error, https://github.com/flutter/flutter/issues/132245.
   String runnerLocalEngineRequiresHostEngine({bool warning = false}) =>
-      '${warning ? 'Warning! ' : ''}You are using a locally built engine (--local-engine) but have not specified --local-host-engine.\n'
+      '${warning ? 'Warning! ' : ''}You are using a locally built engine (--local-engine) but have not specified --local-engine-host.\n'
       'You may be building with a different engine than the one you are running with. '
       'See https://github.com/flutter/flutter/issues/132245 for details (in the future this will become '
       'an error).';

packages/flutter_tools/test/general.shard/runner/local_engine_test.dart

@@ -119,7 +119,7 @@ void main() {
     expect(logger.traceText, contains('Local engine source at /arbitrary/engine/src'));
   });
 
-  testWithoutContext('works but produces a warning if --local-engine is specified but not --local-host-engine', () async {
+  testWithoutContext('works but produces a warning if --local-engine is specified but not --local-engine-host', () async {
     final FileSystem fileSystem = MemoryFileSystem.test();
     final Directory localEngine = fileSystem
         .directory('$kArbitraryEngineRoot/src/out/android_debug_unopt_arm64/')
@@ -142,7 +142,7 @@ void main() {
         targetEngine: '/arbitrary/engine/src/out/android_debug_unopt_arm64',
       ),
     );
-    expect(logger.statusText, contains('Warning! You are using a locally built engine (--local-engine) but have not specified --local-host-engine'));
+    expect(logger.statusText, contains('Warning! You are using a locally built engine (--local-engine) but have not specified --local-engine-host'));
   });
 
   testWithoutContext('fails if --local-engine-host is emitted and treatMissingLocalEngineHostAsFatal is set', () async {
@@ -164,7 +164,7 @@ void main() {
 
     await expectLater(
       localEngineLocator.findEnginePath(localEngine: localEngine.path),
-      throwsToolExit(message: 'You are using a locally built engine (--local-engine) but have not specified --local-host-engine'),
+      throwsToolExit(message: 'You are using a locally built engine (--local-engine) but have not specified --local-engine-host'),
     );
   });