Merge pull request #8607 from apolcyn/build_strong_name_packages

src/csharp/Grpc.Auth/project.json

src/csharp/Grpc.Core.Tests/project.json

src/csharp/Grpc.Core/project.json

src/csharp/Grpc.Examples.MathClient/project.json

src/csharp/Grpc.Examples.MathServer/project.json

src/csharp/Grpc.Examples.Tests/project.json

src/csharp/Grpc.HealthCheck.Tests/project.json

src/csharp/Grpc.HealthCheck/project.json

src/csharp/Grpc.IntegrationTesting.Client/project.json

src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json

src/csharp/Grpc.IntegrationTesting.Server/project.json

src/csharp/Grpc.IntegrationTesting.StressClient/project.json

src/csharp/Grpc.IntegrationTesting/project.json

src/csharp/build_packages_dotnetcli.bat

templates/src/csharp/Grpc.Auth/project.json.template

templates/src/csharp/Grpc.Core/project.json.template

templates/src/csharp/Grpc.HealthCheck/project.json.template

templates/src/csharp/build_options.include

tools/run_tests/package_targets.py