Synapse change sessionId type from int to string (#25210)

* change sessionId type from int to string

* modify related code

Author: kevinzz6

specification/synapse/data-plane/Microsoft.Synapse/preview/2022-03-01-preview/examples/RunNotebook_Cancel.json

@@ -18,7 +18,7 @@
         "result": {
           "runId": "4b200abf-c90c-43cf-98ae-b9f2bcf90373",
           "runStatus": "Cancelled",
-          "sessionId": -1,
+          "sessionId": "-1",
           "sparkPool": "exampleSparkpool",
           "lastCheckedOn": "0001-01-01T00:00:00"
         }
@@ -37,7 +37,7 @@
         "result": {
           "runId": "4b200abf-c90c-43cf-98ae-b9f2bcf90373",
           "runStatus": "SnapshotTaken",
-          "sessionId": -1,
+          "sessionId": "-1",
           "sparkPool": "exampleSparkpool"
         }
       }

specification/synapse/data-plane/Microsoft.Synapse/preview/2022-03-01-preview/examples/RunNotebook_Create.json

@@ -39,7 +39,7 @@
         "result": {
           "runId": "4b200abf-c90c-43cf-98ae-b9f2bcf90373",
           "runStatus": "Starting",
-          "sessionId": -1,
+          "sessionId": "-1",
           "sparkPool": "exampleSparkpool",
           "lastCheckedOn": "0001-01-01T00:00:00"
         }

specification/synapse/data-plane/Microsoft.Synapse/preview/2022-03-01-preview/examples/RunNotebook_GetSnapshot.json

@@ -232,7 +232,7 @@
           },
           "runId": "e4221395-55ae-4c6d-9756-fae966d84350",
           "runStatus": "Succeeded",
-          "sessionId": 1,
+          "sessionId": "1",
           "sparkPool": "exampleSparkpool",
           "lastCheckedOn": "0001-01-01T00:00:00"
         }

specification/synapse/data-plane/Microsoft.Synapse/preview/2022-03-01-preview/examples/RunNotebook_GetStatus.json

@@ -82,7 +82,7 @@
           "exitValue": null,
           "runId": "4b200abf-c90c-43cf-98ae-b9f2bcf90373",
           "runStatus": "Starting",
-          "sessionId": 2,
+          "sessionId": "2",
           "sparkPool": "exampleSparkpool",
           "lastCheckedOn": "2021-09-06T11:23:58.3733333"
         }

specification/synapse/data-plane/Microsoft.Synapse/preview/2022-03-01-preview/runNotebook.json

@@ -242,8 +242,7 @@
         },
         "sessionId": {
           "description": "Livy session id.",
-          "type": "integer",
-          "format": "int64"
+          "type": "string"
         },
         "sparkPool": {
           "description": "SparkPool name.",
@@ -331,8 +330,7 @@
         },
         "sessionId": {
           "description": "Livy session id.",
-          "type": "integer",
-          "format": "int64"
+          "type": "string"
         },
         "sparkPool": {
           "description": "SparkPool name.",
@@ -378,8 +376,7 @@
         },
         "sessionId": {
           "description": "Livy session id.",
-          "type": "integer",
-          "format": "int64"
+          "type": "string"
         },
         "sparkPool": {
           "description": "SparkPool name.",