Move the singleRequestParameter template into a separate file (#21489)

* Move the singleRequestParameter template into a separate file

* Update formatting of non-singleRequestParameter webclient and restclient samples

samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/api/AnotherFakeApi.java

@@ -46,7 +46,6 @@ public class AnotherFakeApi {
         this.apiClient = apiClient;
     }
 
-    
     /**
      * To test special tags
      * To test special tags and operation ID starting with number

samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/api/DefaultApi.java

@@ -46,7 +46,6 @@ public class DefaultApi {
         this.apiClient = apiClient;
     }
 
-    
     /**
      * 
      * 

samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/api/FakeApi.java

@@ -60,7 +60,6 @@ public class FakeApi {
         this.apiClient = apiClient;
     }
 
-    
     /**
      * 
      * for Java apache and Java native, test toUrlQueryString for maps with BegDecimal keys

samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java

@@ -46,7 +46,6 @@ public class FakeClassnameTags123Api {
         this.apiClient = apiClient;
     }
 
-    
     /**
      * To test class name in snake case
      * To test class name in snake case

samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/api/PetApi.java

@@ -49,7 +49,6 @@ public class PetApi {
         this.apiClient = apiClient;
     }
 
-    
     /**
      * Add a new pet to the store
      * 

samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/api/StoreApi.java

@@ -46,7 +46,6 @@ public class StoreApi {
         this.apiClient = apiClient;
     }
 
-    
     /**
      * Delete purchase order by ID
      * For valid response try integer IDs with value < 1000. Anything above 1000 or nonintegers will generate API errors

samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/api/UserApi.java

@@ -47,7 +47,6 @@ public class UserApi {
         this.apiClient = apiClient;
     }
 
-    
     /**
      * Create user
      * This can only be done by the logged in user.