t-kem: add info print for each algoritm
* tests/t-kem.c (test_kem_sntrup761, test_kem_mceliece6688128f) (test_kem_mlkem512, test_kem_mlkem768, test_kem_mlkem1024, test_kem_raw_x25519) (test_kem_dhkem_x25519): Add 'Checking <algo>' info print.
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>