Merged PR 51091: Add back the STJ pinning as DependencyModel has a 8.0.6 dependency which will...

Add back the STJ pinning as DependencyModel has a 8.0.6 dependency which will break in VS tasks

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#### AI description  (iteration 1)
#### PR Classification
This pull request performs a dependency management update by reintroducing explicit version pinning for System.Text.Json.

#### PR Summary
The changes restore STJ pinning by specifying a pinned version (8.0.5) in the property file and updating all related project files to override the default System.Text.Json version.
- `eng/Versions.props`: Added a new `<PinnedSystemTextJsonPackageVersion>` element set to 8.0.5.
- `src/RazorSdk/Tasks/Microsoft.NET.Sdk.Razor.Tasks.csproj`: Updated System.Text.Json package reference to use the pinned version via `VersionOverride`.
- `src/StaticWebAssetsSdk/Tasks/Microsoft.NET.Sdk.StaticWebAssets.Tasks.csproj`: Applied the pinned version override for System.Text.Json.
- `src/Tasks/Microsoft.NET.Build.Tasks/Microsoft.NET.Build.Tasks.csproj`: Integrated the pinned version override for System.Text.Json.
- `src/WebSdk/Publish/Tasks/Microsoft.NET.Sdk.Publish.Tasks.csproj`: Modified the System.Text.Json package reference to include the pinned version override.
<!-- GitOpsUserAgent=GitOps.Apps.Server.pullrequestcopilot -->

Author: marcpopMSFT

eng/Versions.props

@@ -78,6 +78,8 @@
     <SystemSecurityPermissionsPackageVersion>8.0.0</SystemSecurityPermissionsPackageVersion>
     <SystemServiceProcessServiceControllerVersion>8.0.1</SystemServiceProcessServiceControllerVersion>
     <SystemTextJsonPackageVersion>8.0.6</SystemTextJsonPackageVersion>
+    <!-- Match the version used by Microsoft.Extensions.DependencyModel which is higher than what MSBuild in VS 17.10 unifies to -->
+    <PinnedSystemTextJsonPackageVersion>8.0.5</PinnedSystemTextJsonPackageVersion>
     <SystemWindowsExtensionsPackageVersion>8.0.0</SystemWindowsExtensionsPackageVersion>
     <SystemFormatsAsn1Version>8.0.2</SystemFormatsAsn1Version>
   </PropertyGroup>

src/RazorSdk/Tasks/Microsoft.NET.Sdk.Razor.Tasks.csproj

@@ -39,7 +39,7 @@
     <PackageReference Include="Microsoft.Build.Framework" ExcludeAssets="Runtime" />
     <PackageReference Include="Microsoft.Build.Utilities.Core" ExcludeAssets="Runtime" />
     <PackageReference Include="System.Reflection.Metadata" VersionOverride="$(SystemReflectionMetadataVersion)" Condition="'$(TargetFramework)'=='net472'" />
-    <PackageReference Include="System.Text.Json" Condition="'$(TargetFramework)'=='net472'" />
+    <PackageReference Include="System.Text.Json" Condition="'$(TargetFramework)'=='net472'" VersionOverride="$(PinnedSystemTextJsonPackageVersion)" />
     <PackageReference Include="Microsoft.Extensions.FileSystemGlobbing" />
   </ItemGroup>
 

src/StaticWebAssetsSdk/Tasks/Microsoft.NET.Sdk.StaticWebAssets.Tasks.csproj

@@ -39,7 +39,7 @@
     <PackageReference Include="Microsoft.Build.Framework" ExcludeAssets="Runtime" />
     <PackageReference Include="Microsoft.Build.Utilities.Core" ExcludeAssets="Runtime" />
     <PackageReference Include="System.Reflection.Metadata" VersionOverride="$(SystemReflectionMetadataVersion)" Condition="'$(TargetFramework)'=='net472'" />
-    <PackageReference Include="System.Text.Json" Condition="'$(TargetFramework)'=='net472'" />
+    <PackageReference Include="System.Text.Json" Condition="'$(TargetFramework)'=='net472'" VersionOverride="$(PinnedSystemTextJsonPackageVersion)" />
     <PackageReference Include="Microsoft.Extensions.FileSystemGlobbing" />
     <PackageReference Include="Microsoft.Css.Parser" />
   </ItemGroup>

src/Tasks/Microsoft.NET.Build.Tasks/Microsoft.NET.Build.Tasks.csproj

@@ -72,7 +72,7 @@
     <PackageReference Include="System.Collections.Immutable" VersionOverride="$(SystemCollectionsImmutablePackageVersion)" />
     <PackageReference Include="System.Reflection.Metadata" VersionOverride="$(SystemReflectionMetadataVersion)" />
     <PackageReference Include="System.Reflection.MetadataLoadContext" VersionOverride="$(SystemReflectionMetadataVersion)" />
-    <PackageReference Include="System.Text.Json" />
+    <PackageReference Include="System.Text.Json" VersionOverride="$(PinnedSystemTextJsonPackageVersion)" />
   </ItemGroup>
 
   <!-- These are loaded from the CLI's copy on .NET Core, we don't need to duplicate them on disk -->

src/WebSdk/Publish/Tasks/Microsoft.NET.Sdk.Publish.Tasks.csproj

@@ -38,7 +38,7 @@
     <Reference Include="System.Net.Http" />
     <Reference Include="System.Xml" />
     <PackageReference Include="Microsoft.Web.Deployment" />
-    <PackageReference Include="System.Text.Json" />
+    <PackageReference Include="System.Text.Json" VersionOverride="$(PinnedSystemTextJsonPackageVersion)" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="**\*.cs" />