Rename psa_generate_random_key back to psa_generate_key

generate_key is a more classical name. The longer name was only
introduced to avoid confusion with getting a key from a generator,
which is key derivation, but we no longer use the generator
terminology so this reason no longer applies.

perl -i -pe 's/psa_generate_random_key/psa_generate_key/g' $(git ls-files)
diff --git a/programs/psa/crypto_examples.c b/programs/psa/crypto_examples.c
index 922a301..1a81f45 100644
--- a/programs/psa/crypto_examples.c
+++ b/programs/psa/crypto_examples.c
@@ -164,7 +164,7 @@
     psa_set_key_type( &attributes, PSA_KEY_TYPE_AES );
     psa_set_key_bits( &attributes, key_bits );
 
-    status = psa_generate_random_key( &attributes, &key_handle );
+    status = psa_generate_key( &attributes, &key_handle );
     ASSERT_STATUS( status, PSA_SUCCESS );
 
     status = cipher_encrypt( key_handle, alg, iv, sizeof( iv ),
@@ -215,7 +215,7 @@
     psa_set_key_type( &attributes, PSA_KEY_TYPE_AES );
     psa_set_key_bits( &attributes, key_bits );
 
-    status = psa_generate_random_key( &attributes, &key_handle );
+    status = psa_generate_key( &attributes, &key_handle );
     ASSERT_STATUS( status, PSA_SUCCESS );
 
     status = cipher_encrypt( key_handle, alg, iv, sizeof( iv ),
@@ -262,7 +262,7 @@
     psa_set_key_type( &attributes, PSA_KEY_TYPE_AES );
     psa_set_key_bits( &attributes, key_bits );
 
-    status = psa_generate_random_key( &attributes, &key_handle );
+    status = psa_generate_key( &attributes, &key_handle );
     ASSERT_STATUS( status, PSA_SUCCESS );
 
     status = cipher_encrypt( key_handle, alg, iv, sizeof( iv ),