CI may be broken by illegal instruction

[KaoImin]

The start_with_multi_nodes test sometimes failed with the Illegal instruction error

$ fetch http://127.0.0.1:8004/ {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: '{"jsonrpc":"2.0", "method":"eth_blockNumber", "params": [], "id":42}'
}
FetchError: request to http://127.0.0.1:8001/ failed, reason: connect ECONNREFUSED 127.0.0.1:8001
    at ClientRequest.<anonymous> (file:///home/runner/.npm/_npx/721a1717bb84573e/node_modules/node-fetch/src/index.js:108:11)
    at ClientRequest.emit (node:events:[52](https://github.com/axonweb3/axon/actions/runs/6021605629/job/16334858946?pr=1382#step:4:53)6:35)
    at ClientRequest.emit (node:domain:489:12)
    at Socket.socketErrorListener (node:_http_client:501:9)
    at Socket.emit (node:events:514:28)
    at Socket.emit (node:domain:489:12)
    at emitErrorNT (node:internal/streams/destroy:151:8)
    at emitErrorCloseNT (node:internal/streams/destroy:116:3)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
  type: 'system',
  errno: 'ECONNREFUSED',
  code: 'ECONNREFUSED',
  erroredSysCall: 'connect'
}
/home/runner/work/_temp/003aec82-f[57](https://github.com/axonweb3/axon/actions/runs/6021605629/job/16334858946?pr=1382#step:4:58)4-4384-b2c1-fd29b13a094c.sh: line 29:  1741 Illegal instruction     (core dumped) target/debug/axon run --config devtools/chain/nodes/node_1.toml --chain-spec devtools/chain/specs/multi_nodes_short_epoch_len/chain-spec.toml > /home/runner/work/_temp/ubuntu-22.04/multi-axon-nodes/node_1.log

[chaoticlonghair]

Possible Reason:

• The CPU of the runner which builds the project and caches the binary file, is different with the CPU of the runner which download the binary file from caches and runs tests.

[Flouse]

Ckb-rocksdb uses PORTABLE=1, USE_SSE=1 by default so #1504 might NOT the right solution.

If there are runners that don't support avx2, we should use the portable feature of ckb-rocksdb to disable avx2.

Originally posted by @blckngm in #1504 (comment)

---

Maybe a feature switch is required.