[yang] add Yang model for GRPCCLIENT (#20902)

Why I did it
Adding yang model for CONFIG_DB table GRPCCLIENT
Introduced by
https://github.com/sonic-net/sonic-platform-daemons/blob/b276e415d85f3e8a7c64532d95821c9000c9418d/sonic-ycabled/ycable/ycable_utilities/y_cable_helper.py#L407

src/sonic-yang-models/doc/Configuration.md

@@ -42,6 +42,7 @@ Table of Contents
          * [FABRIC_MONITOR](#fabric-monitor)
          * [FABRIC_PORT](#fabric-port)
          * [FLEX_COUNTER_TABLE](#flex_counter_table)
+         * [GRPCCLIENT](#grpcclient)
          * [Hash](#hash)
          * [IPv6 Link-local] (#ipv6-link-local)
          * [KDUMP](#kdump)

src/sonic-yang-models/setup.py

@@ -204,6 +204,7 @@ def run(self):
                          './yang-models/sonic-bgp-sentinel.yang',
                          './yang-models/sonic-bmp.yang',
                          './yang-models/sonic-xcvrd-log.yang',
+                         './yang-models/sonic-grpcclient.yang',
                          './yang-models/sonic-serial-console.yang',
                          './yang-models/sonic-smart-switch.yang',]),
         ('cvlyang-models', ['./cvlyang-models/sonic-acl.yang',

src/sonic-yang-models/tests/files/sample_config_db.json

@@ -2762,6 +2762,19 @@
 		"log_verbosity": "notice"
 	    }
 	},
+	"GRPCCLIENT": {
+            "config": {
+                "type": "secure",
+                "auth_level": "server",
+                "log_level": "info"
+            },
+            "certs": {
+                "client_crt": "grpcclient.crt",
+                "client_key": "grpcclient.key",
+                "ca_crt": "root.pem",
+                "grpc_ssl_credential": "azureclient.ms"
+            } 
+	},
         "BANNER_MESSAGE": {
             "global": {
                 "state": "enabled",

src/sonic-yang-models/tests/yang_model_tests/tests/grpcclient.json

@@ -0,0 +1,5 @@
+{
+    "GRPCCLIENT_CONFIG_CHANGE_VERBOSITY_LEVEL": {
+        "desc": "Consume verbosity level config changes. "
+    }
+}

src/sonic-yang-models/tests/yang_model_tests/tests_config/grpcclient.json

@@ -0,0 +1,12 @@
+{
+    "GRPCCLIENT_CONFIG_CHANGE_VERBOSITY_LEVEL": {
+        "sonic-grpcclient:sonic-grpcclient": {
+            "sonic-grpcclient:GRPCCLIENT": {
+                "sonic-grpcclient:config": 
+                    {
+                        "log_level": "info"
+                    }
+            }
+        }
+    }
+}

src/sonic-yang-models/yang-models/sonic-grpcclient.yang

@@ -0,0 +1,79 @@
+module sonic-grpcclient {
+    namespace "http://github.com/sonic-net/sonic-grpcclient";
+    prefix grpcclient;
+    yang-version 1.1;
+
+    organization
+        "SONiC";
+
+    contact
+        "SONiC";
+
+    description
+        "SONiC DualToR grpc client configuration data";
+
+    revision 2024-10-14 {
+        description
+            "Initial revision";
+    }
+
+    container sonic-grpcclient {
+
+        container GRPCCLIENT {
+
+            container config {
+
+                leaf type {
+                    type enumeration {
+                        enum secure;
+                        enum insecure;
+                    }
+                    description "grpc client security level. ";
+                }
+
+                leaf auth_level {
+                    type enumeration {
+                        enum server;
+                        enum client;
+                    }
+                    description "grpc client auth level. ";
+                }
+
+                leaf log_level {
+                    type enumeration {
+                        enum info;
+                        enum notice;
+                        enum debug;
+                        enum warning;
+                        enum critical;
+                    }
+                    description "grpc client log level. ";
+                }
+            }
+
+            container certs {
+
+                leaf client_crt {
+                    type string;
+                    description "grpc client certificate file name ";
+
+                }
+
+                leaf client_key {
+                    type string;
+                    description "grpc client key file name ";
+                }
+
+                leaf ca_crt {
+                    type string;
+                    description "grpc client root cert";
+                }
+
+                leaf grpc_ssl_credential {
+                    type string;
+                    description "grpc client ssl credential";
+                }
+            }
+        }
+    }
+}