```Add macros for output buffer sizes

Signed-off-by: gabor-mezei-arm <gabor.mezei@arm.com>
```
```diff --git a/include/psa/crypto_sizes.h b/include/psa/crypto_sizes.h
index d52f85f..119acaa 100644
--- a/include/psa/crypto_sizes.h
+++ b/include/psa/crypto_sizes.h
```
```@@ -141,6 +141,13 @@
0)

+/** The maximum tag size for all supported AEAD algorithms, in bytes.
+ *
+ */
+
/* The maximum size of an RSA key on this implementation, in bits.
* This is a vendor-specific macro.
*
@@ -259,6 +266,24 @@
0)

+/** A sufficient output buffer size for psa_aead_encrypt(), for any of the
+ *  supported key types and AEAD algorithms.
+ *
+ * If the size of the ciphertext buffer is at least this large, it is guaranteed
+ * that psa_aead_encrypt() will not fail due to an insufficient buffer size.
+ *
+ *
+ * \param plaintext_length    Size of the plaintext in bytes.
+ *
+ * \return                    A sufficient output buffer size for any of the
+ *                            supported key types and AEAD algorithms.
+ *
+ */
+
+
/** The maximum size of the output of psa_aead_decrypt(), in bytes.
*
* If the size of the plaintext buffer is at least this large, it is
@@ -283,6 +308,23 @@
0)

+/** A sufficient output buffer size for psa_aead_decrypt(), for any of the
+ *  supported key types and AEAD algorithms.
+ *
+ * If the size of the plaintext buffer is at least this large, it is guaranteed
+ * that psa_aead_decrypt() will not fail due to an insufficient buffer size.
+ *
+ *
+ * \param ciphertext_length   Size of the ciphertext in bytes.
+ *
+ * \return                    A sufficient output buffer size for any of the
+ *                            supported key types and AEAD algorithms.
+ *
+ */
+     (ciphertext_length)
+
/** The default nonce size for an AEAD algorithm, in bytes.
*
* This macro can be used to allocate a buffer of sufficient size to
@@ -382,6 +424,14 @@
PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE :                                  \
0)

+/** A sufficient ciphertext buffer size for psa_aead_finish(), for any of the
+ *  supported key types and AEAD algorithms.
+ *