Adding codebase support to firebase functions:delete (#10929)

* Adding codebase support to firebase functions:delete

* test: add test for targeting specific functions across codebases

* fix(functions): use getCodebasesFromConfig in functions:delete collision check

* fix(functions): handle legacy endpoints and allow bare function deletion across codebases

* Address review comments

* checking live endpoints for delete

* Adding comments, simplifying using helper, and adding test cases for the helpers