tests/intel/kms_fbt: Skip fbcpsr tests on Wa_14016291713

Wa_1401629171 is disabling FBC if PSR is enabled. Check this from FBC
debugfs interface and skip current test if FBC is disabled due to
Wa_14016291713.

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/9525


Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>