Change SdkTest in test/Microsoft.NET.TestFramework/SdkTest.cs to replace the protected field TestAssetsManager _testAssetsManager; with a protected get-only property named TestAssetsManager (PascalCase) placed alongside the existing Log property (i.e., following the Log property).

Requirements:

• Implement as a get-only property: protected TestAssetsManager TestAssetsManager { get; }.
• Initialize it in the constructor using the existing ITestOutputHelper log argument.
• Remove the _testAssetsManager field.
• Update all references across the dotnet/sdk repository from _testAssetsManager to TestAssetsManager.
• Ensure the solution builds/tests compile after the rename.

Context file at commit:

• test/Microsoft.NET.TestFramework/SdkTest.cs (commit 8d32382a17c0219e2a76df7fd4caef6e5d797bc1)
• Source: https://github.com/dotnet/sdk/blob/8d32382a17c0219e2a76df7fd4caef6e5d797bc1/test/Microsoft.NET.TestFramework/SdkTest.cs

Notes:

• Repository code search results shown in chat are limited; you must search the repo for all occurrences of _testAssetsManager and update them.