Complain about bad initialization of operation structures

In every existing test driver entry point that is the setup for a multipart
operation, check that the driver operation structure is all-bits-zero on
entry, as guaranteed by the driver specification.

There is a risk that this isn't the case, mostly, on platforms where
initializing a union to `{0}` initializes only the default member and not
all members.

Signed-off-by: Gilles Peskine <[email protected]>

tests/include/test/drivers/test_driver_common.h

@@ -8,4 +8,10 @@
 
 #include "mbedtls/build_info.h"
 
+/** Error code that test drivers return when they detect that an input
+ * parameter was not initialized properly. This normally indicates a
+ * bug in the core.
+ */
+#define PSA_ERROR_TEST_DETECTED_BAD_INITIALIZATION ((psa_status_t)-0x0201)
+
 #endif /* test_driver_common.h */