[deps]: Update Microsoft.NET.Test.Sdk to v18 (#6449)

* [deps]: Update Microsoft.NET.Test.Sdk to v18

* Use MicrosoftNetTestSdkVersion variable instead of fixed versions

* Bump Microsoft.NET.Test.Sdk from 17.8.0 to 18.0.1 in Directory.Build.props

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Daniel James Smith <djsmith85@users.noreply.github.com>
Co-authored-by: Daniel James Smith <2670567+djsmith85@users.noreply.github.com>

Directory.Build.props

@@ -16,7 +16,7 @@
   
   <PropertyGroup>
     
-    <MicrosoftNetTestSdkVersion>17.8.0</MicrosoftNetTestSdkVersion>
+    <MicrosoftNetTestSdkVersion>18.0.1</MicrosoftNetTestSdkVersion>
     
     <XUnitVersion>2.6.6</XUnitVersion>
     

test/Core.IntegrationTest/Core.IntegrationTest.csproj

@@ -12,7 +12,7 @@
   <ItemGroup>
     <PackageReference Include="coverlet.collector" Version="6.0.4" />
     <PackageReference Include="MartinCostello.Logging.XUnit" Version="0.7.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(MicrosoftNetTestSdkVersion)" />
     <PackageReference Include="Rnwood.SmtpServer" Version="3.1.0-ci0868" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5" />

test/Infrastructure.Dapper.Test/Infrastructure.Dapper.Test.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(MicrosoftNetTestSdkVersion)" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>