p2p spec updates

[0xSulpiride]

Description

• feat: feat(p2p): add chain id to enr eth-infinitism/bundler-spec#21
• feat: feat(p2p): redefine the gossip message id and contents eth-infinitism/bundler-spec#18
• feat: feat(p2p): redefine the pooled_user_op_hashes req/resp eth-infinitism/bundler-spec#17
• feat: feat(p2p): update status/metadata to better track eth2/devp2p eth-infinitism/bundler-spec#15

Types of changes

What types of changes does your code introduce?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Other (please describe):

Further comments (optional)

[0xSulpiride]

We need to agree on the size of MempoolId. The IPFS hash is 46 bytes, so I'd push for this PR - eth-infinitism/bundler-spec#19

[0xSulpiride]

Also we need to switch to one bundler - one chain model - that will be a separate PR