[go-server] Fix: missing quotes for string default value (#18546)

* Update controller mustache

* Add tests to openapi doc

* Regen

samples/server/petstore/go-api-server/api/openapi.yaml

@@ -105,6 +105,30 @@ paths:
           - OPTION_3
           type: string
         style: form
+      - explode: true
+        in: query
+        name: defaultInt
+        required: false
+        schema:
+          default: 1
+          type: integer
+        style: form
+      - explode: true
+        in: query
+        name: defaultNum
+        required: false
+        schema:
+          default: 1.5
+          type: number
+        style: form
+      - explode: true
+        in: query
+        name: defaultStr
+        required: false
+        schema:
+          default: default
+          type: string
+        style: form
       - deprecated: true
         description: Status values that need to be considered for filter
         explode: false
@@ -631,10 +655,10 @@ paths:
         schema:
           type: string
         style: form
-      - description: The password for login in clear text
+      - description: Remember Me
         explode: true
         in: query
-        name: boolean_test
+        name: remember_me
         required: false
         schema:
           type: boolean
@@ -702,10 +726,10 @@ paths:
         schema:
           type: string
         style: simple
-      - description: boolean query parameter
+      - description: Confirm the deletion
         explode: true
         in: query
-        name: boolean_test
+        name: confirmation
         required: false
         schema:
           type: boolean