tests: psa: Move PSA key attributes tests

Move PSA key attributes tests to their own
test suite to be able to run them when
MBEDTLS_PSA_CRYPTO_CLIENT is enabled but
not MBEDTLS_PSA_CRYPTO_C.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index f8ce925..6873dad 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -141,6 +141,7 @@
 add_test_suite(pkwrite)
 add_test_suite(poly1305)
 add_test_suite(psa_crypto)
+add_test_suite(psa_crypto_attributes)
 add_test_suite(psa_crypto_entropy)
 add_test_suite(psa_crypto_hash)
 add_test_suite(psa_crypto_init)