chore: Revert lightpush error handling to allow zero peer publish again succeed

[NagyZoltanPeter]

Description

Previous change on lightpush error handling caused js-waku tests failing and thus ci errors on nwaku side as well.
There had been a discussion around and decision is made to enrich the protocol for the future.
[Epic] Enhance light push protocol

Up until than we do not return error in case there is no suitable peer to publish message comes from lightpush.

Changes

• Changed return error to debug log in lightpush callback in waku_node
• Commented out relevant test that would fail.

Check

• CI's js-waku should not fail

[github-actions]

You can find the image built from this PR at

quay.io/wakuorg/nwaku-pr:2099

Built from 002ec55

[fbarbu15]

I've looked at the js-waku tests and the problem is gone
There's still one failing test but it needs fixing on js side (missing ensureSubscriptions call)
Thanks

[jm-clius]

Thanks for this!

[NagyZoltanPeter]

I've looked at the js-waku tests and the problem is gone There's still one failing test but it needs fixing on js side (missing ensureSubscriptions call) Thanks

Hi Floring!
Great.... at least I would not worry about still failing js-waku tests.

[NagyZoltanPeter]

Merging this PR to allow js-waku CI jobs succeed. Adjusted with Florin that this change fixes js-waku relevant test fail.