Improve API to get Space permissions

Summary

At present the API /wiki/rest/api/space/KEY?expand=permissions doesnt give results for ALL>>Delete Own, PAGE >>archive and MAIL>>Delete

Steps to Reproduce

1. Open a browser tab
2. Add a JSON viewer extension from the web store
3. Add a set of permissions on the UI end of the space.
4. Use this API https://sitename.atlassian.net/wiki/rest/api/space/spacekey?expand=permissions to get the space permissions.
5. It should all the permissions parameter i.e all 15 in space permissions.
6. Currently, this API will only give 12 operations excluding ALL>>Delete Own, PAGE >>archive and MAIL>>Delete
   
   Browser Console

   function main() {
       const getData = async () => {
           const url = 'https://<SITENAME>.atlassian.net/wiki/rest/api/space/<SPACEKEY>?expand=permissions';
           const response = await fetch(url).then((r) => (r.json()));
           response.permissions.forEach(ele => {console.log(ele.operation)})
       };
       getData();
   }
   main();
   

   Outcome

   {operation: "restrict_content", targetType: "space"}
   VM1098:5 {operation: "create", targetType: "attachment"}
   VM1098:5 {operation: "delete", targetType: "page"}
   VM1098:5 {operation: "export", targetType: "space"}
   VM1098:5 {operation: "create", targetType: "comment"}
   VM1098:5 {operation: "create", targetType: "blogpost"}
   VM1098:5 {operation: "delete", targetType: "comment"}
   VM1098:5 {operation: "delete", targetType: "blogpost"}
   VM1098:5 {operation: "delete", targetType: "attachment"}
   VM1098:5 {operation: "create", targetType: "page"}
   VM1098:5 {operation: "administer", targetType: "space"}
   VM1098:5 {operation: "read", targetType: "space"}
   

It's not showing Archive, Delete Own, and Mail delete permissions

Suggestion

For Users to inspect and see consolidated space permissions, it's good to include all 15 operations when using API.