tf-m-build-and-test: Remove cs1k default config group

CS1K build config has been added into "pp_test" config group.
So "pp_corstone1000" config group can be deprecated.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I9e782a49ff79f0e8a49573bfc5217d70e201c6d1
1 file changed