fix, refactor, chore(egen): adds endpoint.wait() to fix timeout error, hardcodes TF to 2.15.1, adds code in cleanup section to delete locally generated files, refactors code as per template guidelides, performs linter test

fix, refactor, chore(egen): adds endpoint.wait() to fix timeout error, hardcodes TF to 2.15.1, adds code in cleanup section to delete locally generated files, refactors code as per template guidelides, performs linter test #8908