noble-amd64-hafnium: python environment refactor

Drop the symbolic link to python, use pip3 instead when
installing dependencies, and manage python environment
changes after installing all pkgs.

Change-Id: I451da8b1c5830dad66e1ed1c17a34afd0dbdbd58
Signed-off-by: J-Alves <joao.alves@arm.com>
1 file changed