[OTLP] Fix native AoT compatibility

Update Microsoft.Extensions.Configuration.Binder for `net8.0` to fix issues with native AoT and configurating binding.

Author: martincostello

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/OpenTelemetry.Exporter.OpenTelemetryProtocol.csproj

@@ -19,6 +19,11 @@
     <AllowUnsafeBlocks Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == '$(NetFrameworkMinimumSupportedVersion)'">true</AllowUnsafeBlocks>
   </PropertyGroup>
 
+  <!-- This package is explicitly upgraded for .NET 8 to fix native AoT compatibility issues -->
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" VersionOverride="8.0.2" Condition="'$(TargetFramework)' == 'net8.0'" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry\OpenTelemetry.csproj" />
   </ItemGroup>