Flag to build latest framework to ASP.NET Core interop tests

templates/tools/dockerfile/interoptest/grpc_interop_aspnetcore/build_interop.sh.template

@@ -41,5 +41,5 @@
 
   # Cloning from a local path sets RepositoryUrl to a path and breaks Source Link.
   # Override RepositoryUrl to a URL to fix Source Link. The value doesn't matter.
-  dotnet build --configuration Debug --output ./output/InteropTestsWebsite testassets/InteropTestsWebsite/InteropTestsWebsite.csproj -p:RepositoryUrl=https://github.com/grpc/grpc-dotnet.git
-  dotnet build --configuration Debug --output ./output/InteropTestsClient testassets/InteropTestsClient/InteropTestsClient.csproj -p:RepositoryUrl=https://github.com/grpc/grpc-dotnet.git
+  dotnet build --configuration Debug --output ./output/InteropTestsWebsite testassets/InteropTestsWebsite/InteropTestsWebsite.csproj -p:RepositoryUrl=https://github.com/grpc/grpc-dotnet.git -p:LatestFramework=true
+  dotnet build --configuration Debug --output ./output/InteropTestsClient testassets/InteropTestsClient/InteropTestsClient.csproj -p:RepositoryUrl=https://github.com/grpc/grpc-dotnet.git -p:LatestFramework=true

tools/dockerfile/interoptest/grpc_interop_aspnetcore/build_interop.sh

@@ -39,5 +39,5 @@ fi
 
 # Cloning from a local path sets RepositoryUrl to a path and breaks Source Link.
 # Override RepositoryUrl to a URL to fix Source Link. The value doesn't matter.
-dotnet build --configuration Debug --output ./output/InteropTestsWebsite testassets/InteropTestsWebsite/InteropTestsWebsite.csproj -p:RepositoryUrl=https://github.com/grpc/grpc-dotnet.git
-dotnet build --configuration Debug --output ./output/InteropTestsClient testassets/InteropTestsClient/InteropTestsClient.csproj -p:RepositoryUrl=https://github.com/grpc/grpc-dotnet.git
+dotnet build --configuration Debug --output ./output/InteropTestsWebsite testassets/InteropTestsWebsite/InteropTestsWebsite.csproj -p:RepositoryUrl=https://github.com/grpc/grpc-dotnet.git -p:LatestFramework=true
+dotnet build --configuration Debug --output ./output/InteropTestsClient testassets/InteropTestsClient/InteropTestsClient.csproj -p:RepositoryUrl=https://github.com/grpc/grpc-dotnet.git -p:LatestFramework=true