Bump runtime to dotnet 6 (#1471)

* bump runtime to dotnet 6

src/Runner.Worker/ContainerOperationProvider.cs

@@ -55,12 +55,14 @@ namespace GitHub.Runner.Worker
             // Our container feature requires to map working directory from host to the container.
             // If we are already inside a container, we will not able to find out the real working direcotry path on the host.
 #if OS_WINDOWS
+#pragma warning disable CA1416
             // service CExecSvc is Container Execution Agent.
             ServiceController[] scServices = ServiceController.GetServices();
             if (scServices.Any(x => String.Equals(x.ServiceName, "cexecsvc", StringComparison.OrdinalIgnoreCase) && x.Status == ServiceControllerStatus.Running))
             {
                 throw new NotSupportedException("Container feature is not supported when runner is already running inside container.");
             }
+#pragma warning restore CA1416
 #else
             var initProcessCgroup = File.ReadLines("/proc/1/cgroup");
             if (initProcessCgroup.Any(x => x.IndexOf(":/docker/", StringComparison.OrdinalIgnoreCase) >= 0))
@@ -70,6 +72,7 @@ namespace GitHub.Runner.Worker
 #endif
 
 #if OS_WINDOWS
+#pragma warning disable CA1416
             // Check OS version (Windows server 1803 is required)
             object windowsInstallationType = Registry.GetValue(@"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion", "InstallationType", defaultValue: null);
             ArgUtil.NotNull(windowsInstallationType, nameof(windowsInstallationType));
@@ -88,6 +91,7 @@ namespace GitHub.Runner.Worker
             {
                 throw new ArgumentOutOfRangeException(@"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ReleaseId");
             }
+#pragma warning restore CA1416
 #endif
 
             // Check docker client/server version