add config for saml home realm discovery bypass (#8480)

config/default.json

@@ -282,6 +282,8 @@
         "IdpUrl": "",
         "IdpDescriptorUrl": "",
         "AssertionConsumerServiceURL": "",
+        "ScopingIDPProviderId": "",
+        "ScopingIDPName": "",
         "IdpCertificateFile": "",
         "PublicCertificateFile": "",
         "PrivateKeyFile": "",

model/config.go

@@ -1291,6 +1291,9 @@ type SamlSettings struct {
 	IdpDescriptorUrl            *string
 	AssertionConsumerServiceURL *string
 
+	ScopingIDPProviderId *string
+	ScopingIDPName       *string
+
 	IdpCertificateFile    *string
 	PublicCertificateFile *string
 	PrivateKeyFile        *string