.Net - Include Agent Runtime UnitTests in Github Pipeline (#11747)

### Motivation and Context
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  1. Why is this change required?
  2. What problem does it solve?
  3. What scenario does it contribute to?
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Ensure unit-tests for the Agent Runtime are being included in the github
workflows.

### Description
<!-- Describe your changes, the overall approach, the underlying design.
These notes will help understanding how your code works. Thanks! -->

Noticed that the agent runtime projects weren't reporting any coverage
in github build action. Realized the workflows are selecting on projects
with the `UnitTest` suffix.

Example Log (no coverage):
https://github.com/microsoft/semantic-kernel/actions/runs/14673168889/job/41184172441

With this change:


![image](https://github.com/user-attachments/assets/5cd91855-3312-4a81-8e76-eb38aa233ac3)

### Contribution Checklist
<!-- Before submitting this PR, please make sure: -->

- [X] The code builds clean without any errors or warnings
- [X] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [X] All unit tests pass, and I have added new tests where possible
- [X] I didn't break anyone 😄

Author: crickman

dotnet/SK-dotnet.sln

@@ -540,15 +540,15 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Runtime", "Runtime", "{A70E
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Runtime.Abstractions", "src\Agents\Runtime\Abstractions\Runtime.Abstractions.csproj", "{B9C86C5D-EB4C-8A16-E567-27025AC59A28}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Runtime.Abstractions.Tests", "src\Agents\Runtime\Abstractions.Tests\Runtime.Abstractions.Tests.csproj", "{BB74EEE2-F048-A1A4-F53E-2B384A6F8BC4}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Runtime.Abstractions.UnitTests", "src\Agents\Runtime\Abstractions.Tests\Runtime.Abstractions.UnitTests.csproj", "{BB74EEE2-F048-A1A4-F53E-2B384A6F8BC4}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Runtime.Core", "src\Agents\Runtime\Core\Runtime.Core.csproj", "{19DC60E6-AD08-4BCB-A4DF-B80E0941B458}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Runtime.Core.Tests", "src\Agents\Runtime\Core.Tests\Runtime.Core.Tests.csproj", "{A4F05541-7D23-A5A9-033D-382F1E13D0FE}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Runtime.Core.UnitTests", "src\Agents\Runtime\Core.Tests\Runtime.Core.UnitTests.csproj", "{A4F05541-7D23-A5A9-033D-382F1E13D0FE}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Runtime.InProcess", "src\Agents\Runtime\InProcess\Runtime.InProcess.csproj", "{CCC909E4-5269-A31E-0BFD-4863B4B29BBB}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Runtime.InProcess.Tests", "src\Agents\Runtime\InProcess.Tests\Runtime.InProcess.Tests.csproj", "{DA6B4ED4-ED0B-D25C-889C-9F940E714891}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Runtime.InProcess.UnitTests", "src\Agents\Runtime\InProcess.Tests\Runtime.InProcess.UnitTests.csproj", "{DA6B4ED4-ED0B-D25C-889C-9F940E714891}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VectorData.UnitTests", "src\Connectors\VectorData.UnitTests\VectorData.UnitTests.csproj", "{AAC7B5E8-CC4E-49D0-AF6A-2B4F7B43BD84}"
 EndProject