Add `portpicker` to the list of common requirements and update `requirements_lock_3_13_ft.txt` and `requirements_lock_3_14_ft.txt` files.
Although there were no new wheel releases for `portpicker` and `psutil`, it is still possible to generate lock files, and use `@pypi_portpicker` dependency for the tests.
PiperOrigin-RevId: 786050967