.Net: Removed System.Memory.Data dependency (#9970)

### Motivation and Context

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Removed unused `System.Memory.Data` dependency from the solution.

### 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 😄

---------

Co-authored-by: Chris <[email protected]>

Author: dmytrostruk

dotnet/Directory.Packages.props

@@ -58,7 +58,6 @@
     <PackageVersion Include="System.IdentityModel.Tokens.Jwt" Version="7.5.1" />
     <PackageVersion Include="System.IO.Packaging" Version="8.0.1" />
     <PackageVersion Include="System.Linq.Async" Version="6.0.1" />
-    <PackageVersion Include="System.Memory.Data" Version="8.0.1" />
     <PackageVersion Include="System.Net.Http" Version="4.3.4" />
     <PackageVersion Include="System.Numerics.Tensors" Version="8.0.0" />
     <PackageVersion Include="System.Text.Json" Version="8.0.5" />

dotnet/src/SemanticKernel.UnitTests/Extensions/ClientResultExceptionExtensionsTests.cs

@@ -64,7 +64,7 @@ public void ItProvideStatusForResponsesWithoutContent()
         // Assert
         Assert.NotNull(httpOperationException);
         Assert.NotNull(httpOperationException.StatusCode);
-        Assert.Empty(httpOperationException.ResponseContent!);
+        Assert.Null(httpOperationException.ResponseContent);
         Assert.Equal(exception, httpOperationException.InnerException);
         Assert.Equal(exception.Message, httpOperationException.Message);
         Assert.Equal(pipelineResponse.Status, (int)httpOperationException.StatusCode!);

dotnet/src/SemanticKernel.UnitTests/SemanticKernel.UnitTests.csproj

@@ -25,7 +25,6 @@
     <PackageReference Include="Microsoft.ML.Tokenizers" />
     <PackageReference Include="Microsoft.Extensions.Logging.Console" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" />
-    <PackageReference Include="System.Memory.Data" />
   </ItemGroup>
 
   <ItemGroup>