SSL: fix test failures

1. Change USE_PSA_CRYPTO_INIT/DONE to MD_OR_USE.

2. Add missing occurrences - some of these were already necessary in
principle (in one form or another) but where missing and this was not
detected so far as `psa_hash` doesn't complain in case of a missing
init, but now MD makes it visible.

3. Add missing include in ssl_test_lib.h.

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/tests/src/test_helpers/ssl_helpers.c b/tests/src/test_helpers/ssl_helpers.c
index d248e29..b130edd 100644
--- a/tests/src/test_helpers/ssl_helpers.c
+++ b/tests/src/test_helpers/ssl_helpers.c
@@ -1757,7 +1757,7 @@
 #endif
     int expected_handshake_result = options->expected_handshake_result;
 
-    USE_PSA_INIT();
+    MD_OR_USE_PSA_INIT();
     mbedtls_platform_zeroize(&client, sizeof(client));
     mbedtls_platform_zeroize(&server, sizeof(server));
     mbedtls_test_ssl_message_queue server_queue, client_queue;
@@ -2119,7 +2119,7 @@
         mbedtls_free(context_buf);
     }
 #endif
-    USE_PSA_DONE();
+    MD_OR_USE_PSA_DONE();
 }
 #endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */