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/include/psa/crypto_se_driver.h b/include/psa/crypto_se_driver.h
index 8c7ad6d..5fb7bc3 100644
--- a/include/psa/crypto_se_driver.h
+++ b/include/psa/crypto_se_driver.h
@@ -783,7 +783,7 @@
  * \param[in] extra         Extra parameters for key generation. The
  *                          interpretation of this parameter should match the
  *                          interpretation in the `extra` parameter is the
- *                          `psa_generate_random_key` function
+ *                          `psa_generate_key` function
  * \param[in] extra_size    The size in bytes of the \p extra buffer
  * \param[out] p_pubkey_out The buffer where the public key information will
  *                          be placed