[macOS] Suppress Xcode 15 createItemModels warning (flutter#138243)

As of Xcode 15 on macOS Sonoma, the following message is (repeatedly)
output to stderr during builds (repros on non-Flutter apps). It is
supppressed in xcode itself, but not when run from the command-line.

```
2023-11-10 10:44:58.031 xcodebuild[61115:1017566] [MT] DVTAssertions: Warning in /System/Volumes/Data/SWE/Apps/DT/BuildRoots/BuildRoot11/ActiveBuildRoot/Library/Caches/com.apple.xbs/Sources/IDEFrameworks/IDEFrameworks-22267/IDEFoundation/Provisioning/Capabilities Infrastructure/IDECapabilityQuerySelection.swift:103
Details:  createItemModels creation requirements should not create capability item model for a capability item model that already exists.
Function: createItemModels(for:itemModelSource:)
Thread:   <_NSMainThread: 0x6000027c0280>{number = 1, name = main}
Please file a bug at https://feedbackassistant.apple.com with this warning message and any useful information you can provide.
```

This suppresses this message from stderr in our macOS build logs.

Issue: flutter#135277

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there for submitting PRs.
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responsibilities.
- [X] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [X] I signed the [CLA].
- [X] I listed at least one issue that this PR fixes in the description
above.
- [X] I updated/added relevant documentation (doc comments with `///`).
- [X] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [X] All existing and new tests are passing.

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packages/flutter_tools/lib/src/macos/build_macos.dart

@@ -27,9 +27,27 @@ import 'migrations/remove_macos_framework_link_and_embedding_migration.dart';
 /// Filter out xcodebuild logging unrelated to macOS builds:
 /// ```
 /// xcodebuild[2096:1927385] Requested but did not find extension point with identifier Xcode.IDEKit.ExtensionPointIdentifierToBundleIdentifier for extension Xcode.DebuggerFoundation.AppExtensionToBundleIdentifierMap.watchOS of plug-in com.apple.dt.IDEWatchSupportCore
+///
 /// note: Using new build system
+///
+/// xcodebuild[61115:1017566] [MT] DVTAssertions: Warning in /System/Volumes/Data/SWE/Apps/DT/BuildRoots/BuildRoot11/ActiveBuildRoot/Library/Caches/com.apple.xbs/Sources/IDEFrameworks/IDEFrameworks-22267/IDEFoundation/Provisioning/Capabilities Infrastructure/IDECapabilityQuerySelection.swift:103
+/// Details:  createItemModels creation requirements should not create capability item model for a capability item model that already exists.
+/// Function: createItemModels(for:itemModelSource:)
+/// Thread:   <_NSMainThread: 0x6000027c0280>{number = 1, name = main}
+/// Please file a bug at https://feedbackassistant.apple.com with this warning message and any useful information you can provide.
+
 /// ```
-final RegExp _filteredOutput = RegExp(r'^((?!Requested but did not find extension point with identifier|note\:).)*$');
+final RegExp _filteredOutput = RegExp(
+  r'^((?!'
+  r'Requested but did not find extension point with identifier|'
+  r'note\:|'
+  r'\[MT\] DVTAssertions: Warning in /System/Volumes/Data/SWE/|'
+  r'Details\:  createItemModels|'
+  r'Function\: createItemModels|'
+  r'Thread\:   <_NSMainThread\:|'
+  r'Please file a bug at https\://feedbackassistant\.apple\.'
+  r').)*$'
+  );
 
 /// Builds the macOS project through xcodebuild.
 // TODO(zanderso): refactor to share code with the existing iOS code.

packages/flutter_tools/test/commands.shard/hermetic/build_macos_test.dart

@@ -124,6 +124,11 @@ note: Building targets in dependency order
         stderr: '''
 2022-03-24 10:07:21.954 xcodebuild[2096:1927385] Requested but did not find extension point with identifier Xcode.IDEKit.ExtensionSentinelHostApplications for extension Xcode.DebuggerFoundation.AppExtensionHosts.watchOS of plug-in com.apple.dt.IDEWatchSupportCore
 2022-03-24 10:07:21.954 xcodebuild[2096:1927385] Requested but did not find extension point with identifier Xcode.IDEKit.ExtensionPointIdentifierToBundleIdentifier for extension Xcode.DebuggerFoundation.AppExtensionToBundleIdentifierMap.watchOS of plug-in com.apple.dt.IDEWatchSupportCore
+2023-11-10 10:44:58.030 xcodebuild[61115:1017566] [MT] DVTAssertions: Warning in /System/Volumes/Data/SWE/Apps/DT/BuildRoots/BuildRoot11/ActiveBuildRoot/Library/Caches/com.apple.xbs/Sources/IDEFrameworks/IDEFrameworks-22267/IDEFoundation/Provisioning/Capabilities Infrastructure/IDECapabilityQuerySelection.swift:103
+Details:  createItemModels creation requirements should not create capability item model for a capability item model that already exists.
+Function: createItemModels(for:itemModelSource:)
+Thread:   <_NSMainThread: 0x6000027c0280>{number = 1, name = main}
+Please file a bug at https://feedbackassistant.apple.com with this warning message and any useful information you can provide.
 STDERR STUFF
 ''',
       onRun: () {
@@ -247,6 +252,10 @@ STDERR STUFF
     expect(testLogger.errorText, isNot(contains('xcodebuild[2096:1927385]')));
     expect(testLogger.errorText, isNot(contains('Using new build system')));
     expect(testLogger.errorText, isNot(contains('Building targets in dependency order')));
+    expect(testLogger.errorText, isNot(contains('DVTAssertions: Warning in')));
+    expect(testLogger.errorText, isNot(contains('createItemModels')));
+    expect(testLogger.errorText, isNot(contains('_NSMainThread:')));
+    expect(testLogger.errorText, isNot(contains('Please file a bug at https://feedbackassistant')));
   }, overrides: <Type, Generator>{
     FileSystem: () => fileSystem,
     ProcessManager: () => FakeProcessManager.list(<FakeCommand>[