Motivation:

When processing large responses, chunking them into many 16kb chunks
causes excessive load on PoolArena which slows down AbstractUnsafe.flush0.

Modifications:

Allocate an outNetBuf based on setWrapDataSize. If setWrapDataSize is larger
than SSL packet length, iteratively slice the data buffer, encrypting chunks
into the one larger buffer.

Reduce unnecessary composition in AbstractCoalescingBufferQueue when a call
to remove() only needs to process one buffer.

Result:

Eliminate contention in PoolArena relative to splitting large responses,
thus increasing overall throughput and reducing overall memory pressure.

Relates to netty#13549