rename port to web-port and hostname to web-hostname (#40370)

packages/flutter_tools/lib/src/commands/run.dart

@@ -289,8 +289,8 @@ class RunCommand extends RunCommandBase {
         dumpSkpOnShaderCompilation: argResults['dump-skp-on-shader-compilation'],
         observatoryPort: observatoryPort,
         verboseSystemLogs: argResults['verbose-system-logs'],
-        hostname: featureFlags.isWebEnabled ? argResults['hostname'] : '',
-        port: featureFlags.isWebEnabled ? argResults['port'] : '',
+        hostname: featureFlags.isWebEnabled ? argResults['web-hostname'] : '',
+        port: featureFlags.isWebEnabled ? argResults['web-port'] : '',
       );
     }
   }

packages/flutter_tools/lib/src/runner/flutter_command.dart

@@ -133,12 +133,12 @@ abstract class FlutterCommand extends Command<void> {
   }
 
   void usesWebOptions({ bool hide = true }) {
-    argParser.addOption('hostname',
+    argParser.addOption('web-hostname',
       defaultsTo: 'localhost',
       help: 'The hostname to serve web application on.',
       hide: hide,
     );
-    argParser.addOption('port',
+    argParser.addOption('web-port',
       defaultsTo: null,
       help: 'The host port to serve the web application from. If not provided, the tool '
         'will select a random open port on the host.',