Fix memory leaks in ossl_quic_calculate_retry_integrity_tag()

Fix memory leaks in ossl_quic_calculate_retry_integrity_tag()

Fixes #25625

Several error paths return 0 directly instead of going to err to clean
up the objects.

CLA: trivial

Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25636)