Disable KerberosExecutor on LinuxBionic, it doesn't have GSSAPI libraries (#75047)

Co-authored-by: Filip Navara <[email protected]>

Author: github-actions[bot]

src/libraries/Common/tests/System/Net/Security/Kerberos/KerberosExecutor.cs

@@ -29,7 +29,9 @@ public class KerberosExecutor : IDisposable
     private readonly ITestOutputHelper _testOutputHelper;
 
     public static bool IsSupported { get; } =
-        RemoteExecutor.IsSupported && (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS());
+        RemoteExecutor.IsSupported &&
+        !PlatformDetection.IsLinuxBionic &&
+        (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS());
     public const string DefaultAdminPassword = "PLACEHOLDERadmin.";
 
     public const string DefaultUserPassword = "PLACEHOLDERcorrect20";