[YANG] Align to authentication check with load_minigraph to cover more scenarios (#18908)

#### Why I did it
This will cover more cases for those only have authentication enabled with tacacs but not authorization enabled. Also, make it algin with the check in load_minigraph
#### How I did it
Change to authentication
#### How to verify it
unit test

Author: wen587

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

@@ -15,12 +15,12 @@
         "eStrKey": "Pattern",
         "eStr": ["false|true|False|True"]
     },
-    "AAA_AUTHORIZATION_TEST": {
-        "desc": "Configure an authorization type in AAA table."
+    "AAA_AUTHENTICATION_TEST": {
+        "desc": "Configure an authentication type in AAA table."
     },
-    "AAA_AUTHORIZATION_TEST_TACACS_WITHOUT_TACPLUS": {
-        "desc": "Configure tacacs in authorization type in AAA table without TACPLUS table.",
-        "eStr": ["Authorization with 'tacacs+' is not allowed when passkey not exists."]
+    "AAA_AUTHENTICATION_TEST_TACACS_WITHOUT_TACPLUS": {
+        "desc": "Configure tacacs in authentication type in AAA table without TACPLUS table.",
+        "eStr": ["Authentication with 'tacacs+' is not allowed when passkey not exists."]
     },
     "AAA_ACCOUNTING_TEST": {
         "desc": "Configure an accounting type in AAA table."

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

@@ -4,7 +4,7 @@
             "sonic-system-aaa:AAA": {
                 "AAA_LIST": [{
                         "type": "authentication",
-                        "login": "tacacs+,local",
+                        "login": "local",
                         "failthrough": "True",
                         "fallback": "True",
                         "trace": "True",
@@ -45,11 +45,11 @@
         }
     },
 
-    "AAA_AUTHORIZATION_TEST": {
+    "AAA_AUTHENTICATION_TEST": {
         "sonic-system-aaa:sonic-system-aaa": {
             "sonic-system-aaa:AAA": {
                 "AAA_LIST": [{
-                        "type": "authorization",
+                        "type": "authentication",
                         "login": "tacacs+"
                 }]
             }
@@ -64,11 +64,11 @@
         }
     },
 
-    "AAA_AUTHORIZATION_TEST_TACACS_WITHOUT_TACPLUS": {
+    "AAA_AUTHENTICATION_TEST_TACACS_WITHOUT_TACPLUS": {
         "sonic-system-aaa:sonic-system-aaa": {
             "sonic-system-aaa:AAA": {
                 "AAA_LIST": [{
-                        "type": "authorization",
+                        "type": "authentication",
                         "login": "tacacs+"
                 }]
             }

src/sonic-yang-models/yang-models/sonic-system-aaa.yang

@@ -43,8 +43,8 @@ module sonic-system-aaa {
                     default "local";
                 }
 
-                must 'not(./type = "authorization" and contains(./login, "tacacs+") and not(/tacacs:sonic-system-tacacs/tacacs:TACPLUS/tacacs:global/tacacs:passkey))' {
-                    error-message "Authorization with 'tacacs+' is not allowed when passkey not exists.";
+                must 'not(./type = "authentication" and contains(./login, "tacacs+") and not(/tacacs:sonic-system-tacacs/tacacs:TACPLUS/tacacs:global/tacacs:passkey))' {
+                    error-message "Authentication with 'tacacs+' is not allowed when passkey not exists.";
                 }
 
                 leaf failthrough {