[FEATURE] Optimize rlp encode/decode

[purplesmoke05]

Is your feature request related to a problem? Please describe.

• rlp: improve decoder stream implementation ethereum/go-ethereum#22858
• rlp: optimize byte array handling ethereum/go-ethereum#22924
• rlp: optimize big.Int decoding for size <= 32 bytes ethereum/go-ethereum#22927
• rlp: use atomic.Value for type cache ethereum/go-ethereum#22902
• p2p/rlpx: reduce allocation and syscalls ethereum/go-ethereum#22899

Describe the solution you'd like

Merge upstream changes for RLP encode/decode

[YoshihitoAso]

I also intend to incorporate the following PR at the same time.

• rlp: minor optimizations for slice/array encoding ethereum/go-ethereum#23467
• rlp: using unsafe.Slice instead of SliceHeader ethereum/go-ethereum#29067