Tests targeting net472 are not run if the tests are launched from Visual Studio

[DaveTryon]

Describe the bug

Our project targets both .NET 8 and .NET Framework 4.7.2. We use Visual Studio (current version 17.12.1) as our IDE. When using release 3.6.4 of MSTest.TestFramework and MSTest.TestAdapter, the tests for both targets are detected and run from within Visual Studio. When we upgrade to release 3.7.0 of MSTest.TestFramework and MSTest.TestAdapter, the .NET Framework 4.7.2 targeted tests appear in the Visual Studio test explorer, but the tests are ignored if the tests are launched inside Visual Studio. All tests run as expected if tests are run from the command line. Here's a table describing the behavior, in case that's clearer:

MSTest.Test* version	Targeted framework	Launch from Visual Studio	Launch via dotnet test
3.6.4	net472	Tests run	Tests run
3.6.4	net80	Tests run	Tests run
3.7.0	net472	Tests are ignored	Tests run
3.7.0	net80	Tests run	Tests run

Steps To Reproduce

This is happening in the https://github.com/microsoft/sbom-tool project, but I'm including a stripped down demo as Sample.zip to simplify the repro.

Using release 3.6.4 of MSTest.Test*

1. Expand the Zip file to a clean local folder
2. Open Sample.sln in visual studio
3. From the menu, Tests > Run All Tests
4. After the tests run, the status bar will report "Test run finished: 2 Tests (2 Passed, 0 Failed, 0 Skipped)'
5. Exit visual studio
6. Execute dotnet test from the command prompt
7. Tests will run, with a summary saying "Test Summary: total: 2, failed: 0, succeeded: 2, skipped: 0"

Using release 3.7.0 of MSTest.Test*

1. Expand the Zip file to a clean local folder
2. Open Directory.Packages.props in a text editor
3. Bump MSTest.TestAdapter (line 13) and MSTest.TestFramework (line 14) from version 3.6.4 to version 3.7.0
4. Save the file
5. Open Sample.sln in visual studio
6. From the menu, Tests > Run All Tests
7. After the tests run, the status bar will report "Test run finished: 1 Tests (1 Passed, 0 Failed, 0 Skipped). This difference from 3.6.4 is the bug being reported
8. Exit visual studio
9. Execute dotnet test from the command prompt
10. Tests will run, with a summary saying "Test Summary: total: 2, failed: 0, succeeded: 2, skipped: 0"

Expected behavior

Tests targeting both net472 and net80 should be detected and run from within Visual Studio

Actual behavior

Tests targeting net80 get detected and run from within Visual Studio, while the tests targeting net472 are ignored from within Visual Studio

Additional context

[Youssef1313]

Thanks for the detailed report and for extracting a small repro. This is a duplicate of #4426 so I'm going to close as a duplicate. As we are in a holiday season, we may not be able to look before the next week. Sorry for the inconvenience.

FYI @Evangelink, this repro here doesn't seem to be using MTP, which is curious.