[fulu] performance issue deserializing DataColumnSidecar

### Describe the bug

there is some significant time to deserialize gossipsub message, which happens multiple times per slot

in this example it's already >= 700ms

my best guess is for gossip DataColumnSidecar message

update:

- confirm that it's DataColumnSidecar message that takes > 100ms to deserialize because I cannot find it in this old profile when hoodi was not forked

[v1.34.0_1k_main.cpuprofile.zip](https://github.com/user-attachments/files/23664594/v1.34.0_1k_main.cpuprofile.zip)

it's likely that this is due to memory allocation where NodeJS works with a lot of small Uint8Arrays

- it also happens in req/resp as well

### Expected behavior

no performance issue
this is part of #8619

### Steps to reproduce

_No response_

### Additional context

_No response_

### Operating system

Linux

### Lodestar version or commit hash

v1.36.0