[JENKINS-22936] Move rename logic to AbstractItem (#3289)

* Move rename infrastructure to a dedicated page at the AbstractItem level

* Preserve existing translations where applicable

* Keep doDoRename method at Job level and remove unneeded compatibility page

* Fix tests

* Fix Javadoc

* Update existing rename tests to use new page

* Update test names for clarity

* Add since tag for newly introduced APIs

* Apply project naming strategy to all renamed items, not just jobs

* Use shorthand accessor

* Clean up Job#doDoRename and deprecate it

* Use new-style web method for doDoRename2

* Remove CheckForNull tag from void method and update Javadoc

* Change names to doConfirmRename and confirm-rename.jelly

* Rename index.jelly to action.jelly and use j:if tag correctly

* Update permission check and remove unused import

* Use new url and update method name in test

* Fix Javadoc

* Fix URL in JobTest

* Update Javadoc for AbstractItem#isNameEditable