Disable UniqueMarshalling COM tests causing "Over release of MOW - COM" assertion

[Copilot]

The tests added in #121643 for UniqueComInterfaceMarshaller are triggering assertion failures in comwrappers.cpp:519 with "Over release of MOW - COM". This is causing widespread CI failures across 24+ builds.

Changes

• Added [ActiveIssue] attribute to GetSameComInterfaceTwiceReturnsUniqueInstances in LibraryImportGenerator.Tests
• Added [ActiveIssue] attribute to MethodReturningComInterfaceReturnsUniqueInstance in ComInterfaceGenerator.Tests

Both tests exercise IUniqueMarshalling.GetThis() which returns the same COM object through the unique marshalling path, exposing a reference counting issue in the COM wrapper infrastructure.

Contributes to #122520

Original prompt

---

This section details on the original issue you should resolve

<issue_title>"Over release of MOW - COM" assert in COM wrappers</issue_title>
<issue_description>```
Discovering: LibraryImportGenerator.Tests (method display = ClassAndMethod, method display options = None)
Discovered: LibraryImportGenerator.Tests (found 162 of 165 test cases)
Starting: LibraryImportGenerator.Tests (parallel test collections = on [2 threads], stop on fail = off)
Assertion failed: (!"Over release of MOW - COM") (/__w/1/s/src/coreclr/interop/comwrappers.cpp: Release: 519)

https://github.com/dotnet/runtime/pull/122407/checks?check_run_id=57752025260
<!-- Error message template -->
### Known Issue Error Message
Fill the error message using [step by step known issues guidance](https://github.com/dotnet/arcade/blob/main/Documentation/Projects/Build%20Analysis/KnownIssueJsonStepByStep.md).
<!-- Use ErrorMessage for String.Contains matches. Use ErrorPattern for regex matches (single line/no backtracking). Set BuildRetry to `true` to retry builds with this error. Set ExcludeConsoleLog to `true` to skip helix logs analysis. -->
```json
{
"ErrorMessage": "Over release of MOW - COM",
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎
Result validation:⚠️ Validation could not be done without an Azure DevOps build URL on the issue. Please add it to the "Build: 🔎" line.
Validation performed at: 12/11/2025 3:35:19 PM UTC

Report

Build	Definition	Test	Pull Request
1228887	dotnet/runtime	LibraryImportGenerator.Tests.WorkItemExecution	#121679
1228892	dotnet/runtime	LibraryImportGenerator.Tests.WorkItemExecution	#122211
1228819	dotnet/runtime	LibraryImportGenerator.Tests.WorkItemExecution	#122414
1228776	dotnet/runtime	LibraryImportGenerator.Tests.WorkItemExecution	#122466
1228768	dotnet/runtime	LibraryImportGenerator.Tests.WorkItemExecution	#121513
1228677	dotnet/runtime	LibraryImportGenerator.Tests.WorkItemExecution	#122463
1228706	dotnet/runtime	LibraryImportGenerator.Tests.WorkItemExecution
1228445	dotnet/runtime	LibraryImportGenerator.Tests.WorkItemExecution	#119352
1228658	dotnet/runtime	LibraryImportGenerator.Tests.WorkItemExecution	#122460
1228403	dotnet/runtime	LibraryImportGenerator.Tests.WorkItemExecution	#122023
[1228505](https://dev.azure.com/d...

• Fixes"Over release of MOW - COM" assert in COM wrappers #122447

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[jkotas]

Duplicate of#122474

[Copilot]

Pull request overview

This PR temporarily disables two failing tests related to UniqueComInterfaceMarshaller that are causing widespread CI failures due to a COM reference counting issue. The tests trigger an "Over release of MOW - COM" assertion in the CoreCLR COM wrapper infrastructure.

Key changes:

• Added [ActiveIssue] attributes to disable two tests until the underlying COM wrapper bug is fixed
• Both disabled tests exercise the same unique marshalling path via IUniqueMarshalling.GetThis()

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
LibraryImportGenerator.Tests/NativeMarshallingAttributeTests.cs	Disables GetSameComInterfaceTwiceReturnsUniqueInstances test that verifies unique instances are returned when calling a LibraryImport method twice
ComInterfaceGenerator.Tests/NativeMarshallingAttributeTests.cs	Disables MethodReturningComInterfaceReturnsUniqueInstance test that verifies a COM interface method returning itself creates a new managed instance

The changes are minimal, consistent, and correctly formatted. Both tests use the same [ActiveIssue] URL referencing issue #122520, which matches the tracking issue mentioned in the PR description. The approach follows established patterns in the codebase for disabling failing tests pending fixes.