fix: dev: QUIC crypto fixes

The isc_crypto_aead_open() and isc_crypto_aead_seal() functions
in ossl3.c didn't check if 'additional_data' exists before using
it. The checks were in place in the ossl1_1.c implementation. Use
the same conditions in the ossl3.c implementation too.

Additionally, the ciphertext length passed to the EVP_DecryptUpdate()
function included the tag length too which caused errors when decrypting.
Use the 'len' variable instead which doesn't include the tag length.

Merge branch 'aram/quic-crypto-fixes' into 'main'

See merge request isc-projects/bind9!12413