xtest: pkcs11_1005: Test AES GCM support flag

Extends Test 1005 to include checks for AES-GCM flag with both
valid and invalid uage.

Signed-off-by: Marouene Boubakri <marouene.boubakri@nxp.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>