twister: runner: add extra_args supporting platform and soc

like extra_confs, add extr_args filterable by
soc:<arch>:<extra_args> or
platfrom:<platform name>: <extra_args>
simulation:<simulator name>: <extra_args>

which will only apply to given platform or arch

Signed-off-by: Hake Huang <hake.huang@oss.nxp.com>