Neuter CRYPTO data in HANDSHAKE level when discarding handshake keys. Protected by gfe2_reloadable_flag_quic_fix_neuter_handshake_data. This is used to fix a corner case where HANDSHAKE data is marked as lost, but handshake key is discarded before it gets retransmitted. PiperOrigin-RevId: 324676804 Change-Id: I049458e51bdbb8c36892fafb11ec1ba71ba9dece