* cmd/devp2p/internal/ethtest: only use eth66 if eth66 is negotiated

* cmd/devp2p/internal/ethtest: switch on concrete type not pointer

* cmd/devp2p/internal/ethtest: switch on concrete type not pointer

WriteTo is unused, and go vet warns about it because it
doesn't match the usual signature of the io.WriterTo method.

This reverts commit c368f728.

This PR modifies the post-PING-send expectations to both be laxer and stricter: it doesn't care what order the packets arrive, but also verifies that exactly one PING and one PONG is returned.

This PR fixes a false positive PONG 'to' endpoint mismatch seen in hive tests:

    got {IP:172.17.0.7 UDP:44025 TCP:44025}, want {IP:172.17.0.7 UDP:44025 TCP:0}

Co-authored-by: Felix Lange <fjl@twurst.com>

This PR refactors the eth test suite to make it more readable and
easier to use. Some notable differences:

- A new file helpers.go stores all of the methods used between
  both eth66 and eth65 and below tests, as well as methods shared
  among many test functions.
- suite.go now contains all of the test functions for both eth65
  tests and eth66 tests.
- The utesting.T object doesn't get passed through to other helper methods,
  but is instead only used within the scope of the test function,
  whereas helper methods return errors, so only the test function
  itself can fatal out in the case of an error.
- The full test suite now only takes 13.5 seconds to run.

This changes the SimultaneousRequests test to send the requests from the same
connection, as it doesn't really make sense to test whether a node can respond
to two requests with different request IDs from separate connections.

This PR fixes a couple of issues in the eth test suite that caused flakiness when run in the CI.

This adds a test for large tx announcement messages, as well as a test to
check that announced tx hashes are requested by the node.

This change adds a Go unit test that runs the protocol test suite
against the go-ethereum implementation of the eth protocol.

The new -limit option makes the filter operate on top N nodes by score.
This also adds ENR attribute stats in the nodeset info command.
Node set commands are now documented in README.

This upgrades the cloudflare client dependency to v0.14.0. The new
version changes the API because all methods now require a context
parameter. This change also reduces the log level of the 'Skipping...'
message to debug, following a similar change in the AWS deployer.

* cmd/devp2p: fix comparison of TXT record value

The AWS API returns quoted DNS strings, so we must encode the new value
before comparing it against the existing record content.

* cmd/devp2p: add test

* cmd/devp2p: fix typo and rename val -> newValue

In Geth v1.10, we changed the structure of the "les" ENR entry. As a result, the DHT crawler that creates the DNS lists
no longer recognizes the les nodes, which is fixed in this commit. 

* cmd/devp2p: skip ENR field tails properly in nodeset filter
* cmd/devp2p: fix tail decoder for snap as well
* les: fix tail decoding in "eth" ENR entry

Add old block announcement test to eth test suite, checks to make sure old block announcement isn't propagated

This PR fixes a regression introduced in #22360, when we updated to the v2 of the AWS sdk, which causes current crawler to just get the same first 100 results over and over, and get stuck in a loop.

This updates the DNS deployer to use AWS SDK v2. Migration is relatively
seamless, although there were two locations that required a slightly
different approach to achieve the same results. In particular, waiting for
DNS change propagation is very different with SDK v2. 

This change also optimizes DNS updates by publishing all changes before
waiting for propagation.

This PR fixes an issue with the eth66 test suite where, during a readAndServe when
the test is manually responding to GetBlockHeader requests, it now responds
with a BlockHeaders eth66 packet that includes the inbound request ID.

Co-authored-by: Martin Holst Swende <martin@swende.se>

This updates the eth protocol test suite to use the message type
definitions of the 'production' protocol implementation in eth/protocols/eth.

* cmd/devp2p/internal/ethtest: added large announcement tests

* cmd/devp2p/internal/ethtest: added large announcement tests

* cmd/devp2p/internal/ethtest: refactored stuff a bit

* cmd/devp2p/internal/ethtest: added TestMaliciousStatus/Handshake

* cmd/devp2p/internal/ethtest: fixed rebasing issue

* happy linter, happy life

* cmd/devp2p/internal/ethtest: used readAndServe

* stuff

* cmd/devp2p/internal/ethtest: fixed test cases

This PR replaces the old test genesis.json and chain.rlp files in the testdata
directory for the eth protocol test suite, and also adds documentation for
running the eth test suite locally.

It also improves the test output text and adds more timeouts.

Co-authored-by: Felix Lange <fjl@twurst.com>