gh-38662: configure.ac: disable more packages with --disable-notebook
The h11 package is used only by httpcore, and httpcore is used only by
httpx, and httpx is used only by jupyterlab. Since jupyterlab is already
disabled by `--disable-notebook`, the others can be too.
URL: https://github.com/sagemath/sage/pull/38662
Reported by: Michael Orlitzky
Reviewer(s): Dima Pasechnik
