Disable clang format in the plugin registrants (flutter#76662)

Author: Emmanuel Garcia

packages/flutter_tools/lib/src/plugins.dart

@@ -990,6 +990,8 @@ const String _objcPluginRegistryHeaderTemplate = '''
 //  Generated file. Do not edit.
 //
 
+// clang-format off
+
 #ifndef GeneratedPluginRegistrant_h
 #define GeneratedPluginRegistrant_h
 
@@ -1010,6 +1012,8 @@ const String _objcPluginRegistryImplementationTemplate = '''
 //  Generated file. Do not edit.
 //
 
+// clang-format off
+
 #import "GeneratedPluginRegistrant.h"
 
 {{#plugins}}
@@ -1036,6 +1040,8 @@ const String _swiftPluginRegistryTemplate = '''
 //  Generated file. Do not edit.
 //
 
+// clang-format off
+
 import {{framework}}
 import Foundation
 
@@ -1146,6 +1152,8 @@ const String _cppPluginRegistryHeaderTemplate = '''
 //  Generated file. Do not edit.
 //
 
+// clang-format off
+
 #ifndef GENERATED_PLUGIN_REGISTRANT_
 #define GENERATED_PLUGIN_REGISTRANT_
 
@@ -1162,6 +1170,8 @@ const String _cppPluginRegistryImplementationTemplate = '''
 //  Generated file. Do not edit.
 //
 
+// clang-format off
+
 #include "generated_plugin_registrant.h"
 
 {{#plugins}}
@@ -1181,6 +1191,8 @@ const String _linuxPluginRegistryHeaderTemplate = '''
 //  Generated file. Do not edit.
 //
 
+// clang-format off
+
 #ifndef GENERATED_PLUGIN_REGISTRANT_
 #define GENERATED_PLUGIN_REGISTRANT_
 
@@ -1197,6 +1209,8 @@ const String _linuxPluginRegistryImplementationTemplate = '''
 //  Generated file. Do not edit.
 //
 
+// clang-format off
+
 #include "generated_plugin_registrant.h"
 
 {{#plugins}}