[ReleasePR streamanalytics] [Stream Analytics] Fix s360 for 2021 preview version (#2161)

Create to sync Azure/azure-rest-api-specs#18305
[ReCreate this PR](https://github.com/azure-resource-manager-schemas/compare/main...AzureSDKAutomation:sdkAuto/streamanalytics?expand=1)

Author: msftbot[bot]

schemas/2020-03-01-preview/Microsoft.StreamAnalytics.json

@@ -291,10 +291,6 @@
         "privateLinkServiceId": {
           "type": "string",
           "description": "The resource id of the private link service. Required on PUT (CreateOrUpdate) requests."
-        },
-        "requestMessage": {
-          "type": "string",
-          "description": "A message passed to the owner of the remote resource with this connection request. Restricted to 140 chars."
         }
       },
       "description": "Bag of properties defining a privatelinkServiceConnection."

schemas/2020-03-01/Microsoft.StreamAnalytics.json

@@ -368,6 +368,21 @@
     }
   },
   "definitions": {
+    "AggregateFunctionProperties": {
+      "type": "object",
+      "properties": {
+        "type": {
+          "type": "string",
+          "enum": [
+            "Aggregate"
+          ]
+        }
+      },
+      "required": [
+        "type"
+      ],
+      "description": "The properties that are associated with an aggregate function."
+    },
     "AvroSerialization": {
       "type": "object",
       "properties": {
@@ -1688,6 +1703,46 @@
       "properties": {},
       "description": "The physical binding of the function. For example, in the Azure Machine Learning web service’s case, this describes the endpoint."
     },
+    "FunctionConfiguration": {
+      "type": "object",
+      "properties": {
+        "binding": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/FunctionBinding"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "The physical binding of the function. For example, in the Azure Machine Learning web service’s case, this describes the endpoint."
+        },
+        "inputs": {
+          "oneOf": [
+            {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/FunctionInput"
+              }
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ]
+        },
+        "output": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/FunctionOutput"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Describes the output of a function."
+        }
+      }
+    },
     "FunctionInput": {
       "type": "object",
       "properties": {
@@ -1724,9 +1779,23 @@
       "oneOf": [
         {
           "$ref": "#/definitions/ScalarFunctionProperties"
+        },
+        {
+          "$ref": "#/definitions/AggregateFunctionProperties"
         }
       ],
-      "properties": {},
+      "properties": {
+        "properties": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/FunctionConfiguration"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ]
+        }
+      },
       "description": "The properties that are associated with a function."
     },
     "Identity": {
@@ -2306,62 +2375,9 @@
       ],
       "description": "The properties that are associated with an input containing reference data."
     },
-    "ScalarFunctionConfiguration": {
-      "type": "object",
-      "properties": {
-        "binding": {
-          "oneOf": [
-            {
-              "$ref": "#/definitions/FunctionBinding"
-            },
-            {
-              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
-            }
-          ],
-          "description": "The physical binding of the function. For example, in the Azure Machine Learning web service’s case, this describes the endpoint."
-        },
-        "inputs": {
-          "oneOf": [
-            {
-              "type": "array",
-              "items": {
-                "$ref": "#/definitions/FunctionInput"
-              }
-            },
-            {
-              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
-            }
-          ],
-          "description": "A list of inputs describing the parameters of the function."
-        },
-        "output": {
-          "oneOf": [
-            {
-              "$ref": "#/definitions/FunctionOutput"
-            },
-            {
-              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
-            }
-          ],
-          "description": "Describes the output of a function."
-        }
-      },
-      "description": "Describes the configuration of the scalar function."
-    },
     "ScalarFunctionProperties": {
       "type": "object",
       "properties": {
-        "properties": {
-          "oneOf": [
-            {
-              "$ref": "#/definitions/ScalarFunctionConfiguration"
-            },
-            {
-              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
-            }
-          ],
-          "description": "Describes the configuration of the scalar function."
-        },
         "type": {
           "type": "string",
           "enum": [