Remove dependency on Microsoft.Bcl.TimeProvider for .NET 8+ targets (#2935)

Co-authored-by: jennyf19 <[email protected]>
Co-authored-by: Peter <[email protected]>

Author: 3 people

src/Microsoft.IdentityModel.JsonWebTokens/Microsoft.IdentityModel.JsonWebTokens.csproj

@@ -28,7 +28,7 @@
     <ProjectReference Include="..\Microsoft.IdentityModel.Tokens\Microsoft.IdentityModel.Tokens.csproj" />
   </ItemGroup>
 
-  <ItemGroup>
+  <ItemGroup Condition="!$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net8.0'))">
     <PackageReference Include="Microsoft.Bcl.TimeProvider" Version="$(MicrosoftBclTimeProviderVersion)" />
   </ItemGroup>
 

src/Microsoft.IdentityModel.Tokens/Microsoft.IdentityModel.Tokens.csproj

@@ -57,7 +57,7 @@
     <PackageReference Include="System.Text.Json" Version="$(SystemTextJson)" />
   </ItemGroup>
 
-  <ItemGroup>
+  <ItemGroup Condition="!$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net8.0'))">
     <PackageReference Include="Microsoft.Bcl.TimeProvider" Version="$(MicrosoftBclTimeProviderVersion)" />
   </ItemGroup>