scripts: west_commands: Fix west boards for SoC and arch in modules

Fixes #71761

The `west boards` command parses extra BOARD_ROOTs from Zephyr modules,
so that the boards defined in those modules are automatically listed.

In HWMv2, OOT boards can be described in terms of OOT SoCs, which means
that extra SOC_ROOTs must also be provided. Otherwise, an error message
will be displayed when attempting to list all boards. Therefore, every
Zephyr module SOC_ROOT should be included as well.

In HWMv1 (deprecated), OOT boards can be defined in terms of OOT archs,
but module ARCH_ROOTs had never been included automatically. The fix for
this is long overdue, but it's included for symmetry.

Signed-off-by: Grzegorz Swiderski <grzegorz.swiderski@nordicsemi.no>