BSPs for simulators which do not include a clock tick interrupt source
are incapable of running some tests successfully. This is a common
characteristic of some BSPs and a fixed set of tests. There is no point
in duplicating this list of tests in those BSPs test configuration.
Read testsuites/testdata/require-tick-isr.tcfg for details.
Provide a file per BSP to list tests that do not build for a BSP. This change
removes the BSP_SMALL_MEMORY hack from the code. That hack was a
mistake.
Provide configuration files for each BSP with tests that cannot build.