feat: oversized TLS ClientHello

[gaukas]

Google Chrome 122 (or maybe earlier) started to send an oversized TLS ClientHello if Kyber768-based PQ Key Share has been enabled.

In terms of QUIC, the TLS ClientHello will be broken into several pieces, a fix-sized (~1200B) large piece with offset 0 and other smaller pieces with random length/offset. The fix-sized large chunk was send in the first initial packet as the only frame in the packet, and the rest of the chunks are send in the second packets with other frames (PING/PADDING).