Use MD<->PSA functions from MD light

As usual, just a search-and-replace plus:

1. Removing things from hash_info.[ch]
2. Adding new auto-enable MD_LIGHT in build-info.h
3. Including md_psa.h where needed

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 85451bf..7fb1063 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -3610,7 +3610,7 @@
         operation->ctx->grp.nbits);
 
     psa_algorithm_t hash_alg = PSA_ALG_SIGN_GET_HASH(alg);
-    operation->md_alg = mbedtls_hash_info_md_from_psa(hash_alg);
+    operation->md_alg = mbedtls_md_type_from_psa_alg(hash_alg);
     operation->alg = alg;
 
     /* We only need to store the same length of hash as the private key size