tests: Fix sizing for several test for chips with 24KB of RAM

When adding the nRF52810, which has 24KB of RAM, some of the tests don't
compile anymore due to lack of SRAM. Address this by either filtering
the test out or reducing the amount of memory allocation.

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
5 files changed