tests-psa: Replace collect_build_tfm_args

Placing collect_build_tfm_args into the same location in tests_psa_arch
as in tests_reg cmake list.

When building with CMAKE_BUILD_TYPE=Debug, the inner beetween functions
in tests_psa_arch/spe/CMakeLists.txt removes the CMAKE_BUILD_TYPE
command line argument from TFM_CMDLINE_CONFIGS, therefore it is not
passed to the secure platform, and builds with
CMAKE_BUILD_TYPE=MinTypeRel.

Signed-off-by: Gergely Korcsák <gergely.korcsak@arm.com>
Change-Id: I3a21b62167733dd497d6814d6e3cdf6cd629a551
1 file changed