`core_validatorapi_vc_user_agent` does not report end user readable VC types and versions

[KaloyanTanev]

🎯 Problem to be solved

The metric that we push to prometheus core_validatorapi_vc_user_agent does not always send readable VC type/version. For Lighthouse it doesn't even send one.

i.e.: okhttp/4.12.0 is for Teku. While we know okhttp is a Java HTTP library and we know only Teku uses Java from our stack, it's not intuitive for users. Similar to Go-http-client/1.1 and Prysm.

🛠️ Proposed solution

Ask VCs to include the correct header.

• [x] Lodestar
• [ ] Lighthouse Issue: https://github.com/sigp/lighthouse/issues/7963 PR: https://github.com/sigp/lighthouse/pull/7990
• [x] Teku Issue: https://github.com/Consensys/teku/issues/9602 PR: https://github.com/Consensys/teku/pull/9935
• [ ] Nimbus Issue: https://github.com/status-im/nimbus-eth2/issues/7427 PR:
• [x] Prysm Issue: https://github.com/OffchainLabs/prysm/issues/15435 PR: https://github.com/OffchainLabs/prysm/pull/15574
• [x] Vouch

🧪 Tests

Check for all VCs (including the newly supported - Vouch) if they are properly displayed in the Validator Client Version in Grafana. Easy to test using Kurtosis.

[pinebit]

I think the proper way to solve this is to ask clients to report proper User-Agent. Hope that's doable. I submitted a request with Teku and asked to change the behavior: https://github.com/Consensys/teku/issues/9602

[pinebit]

Request for Prysm: https://github.com/OffchainLabs/prysm/issues/15435

[KaloyanTanev]

Should be done on client teams side.

[KaloyanTanev]

Prysm is fixed ✅

[KaloyanTanev]

I've opened an issue for Nimbus as well: https://github.com/status-im/nimbus-eth2/issues/7427

[KaloyanTanev]

Opened for Lighthouse: https://github.com/sigp/lighthouse/issues/7963