tests: mem_map: no exec test for intel_adsp/ace30/ptl

This needs special treatment because the TEST_MEM_MAP section
is placed at the end. Since there is code in TEST_MEM_MAP,
rimage thinks the whole text section spans from .text to
end of TEST_MEM_MAP, which overlaps .data and others, so
it complains. Skip the execution test to avoid this issue.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>