Fix: Pagination bug with filters payload (#3747)

* Removes the last operators value

* Moved removing the last operator to the payload generator

* Update app/javascript/dashboard/helper/filterQueryGenerator.js

This makes sure the last operator is never sent to the request

Co-authored-by: Nithin David Thomas <1277421+nithindavid@users.noreply.github.com>

* Fixed the test specs

* Fixed the intendation and added comments

Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
Co-authored-by: Nithin David Thomas <1277421+nithindavid@users.noreply.github.com>

app/javascript/dashboard/helper/specs/filterQueryGenerator.spec.js

@@ -31,7 +31,7 @@ const testData = [
     attribute_key: 'id',
     filter_operator: 'equal_to',
     values: 'This is a test',
-    query_operator: null,
+    query_operator: 'or',
   },
 ];
 
@@ -53,7 +53,6 @@ const finalResult = {
       attribute_key: 'id',
       filter_operator: 'equal_to',
       values: ['This is a test'],
-      query_operator: null,
     },
   ],
 };