Test: Simplify regression test build control

Remove TEST_FRAMEWORK_S/NS.
TEST_FRAMEWORK_NS/S can be replaced by the pair of TEST_NS/S_REG_TEST
and NS. It can remove duplicated test flags

Signed-off-by: David Hu <david.hu@arm.com>
Change-Id: Ida6b6dd951c29e0483a276c411d67874317e08ba
12 files changed