Use maximum allowed response size for request/response protocols (#5753)

# Description

Adjust the PoV response size to the default values used in the
substrate.
Fixes https://github.com/paritytech/polkadot-sdk/issues/5503

## Integration

The changes shouldn't impact downstream projects since we are only
increasing the limit.

## Review Notes

You can't see it from the changes, but it affects all protocols that use
the `POV_RESPONSE_SIZE` constant.
- Protocol::ChunkFetchingV1
- Protocol::ChunkFetchingV2
- Protocol::CollationFetchingV1
- Protocol::CollationFetchingV2
- Protocol::PoVFetchingV1
- Protocol::AvailableDataFetchingV1

## Increasing timeouts


https://github.com/paritytech/polkadot-sdk/blob/fae15379/polkadot/node/network/protocol/src/request_response/mod.rs#L126-L129

I assume the current PoV request timeout is set to 1.2s to handle 5
consecutive requests during a 6s block. This setting does not relate to
the PoV response size. I see no reason to change the curren...