IF: P2P: Fix stuck in peer syncing state

[heifner]

Test failure: https://github.com/AntelopeIO/spring/actions/runs/8662797812/job/23755999003

The producing node (Node00) did not send to the validating node (Node02) because Node00 thought Node02 was still syncing from it. Node00 thought that Node02 was still syncing because when Node02 tried to send it the handshake after receiving blocks, it had not applied any of those blocks to its internal block chain state. Therefore, the handshake was not sent because nothing had changed.

Delay sending handshakes on becoming in_sync until controller state is caught up to head. This will make sure the handshake sent to other nodes reflects current synced up state instead of non synced up state. Also go from lib_catchup to head_catchup instead of jumping to in_sync so that the mechanism for determining to send handshakes does not miss the transition.

[heifner]

Another failure: https://github.com/AntelopeIO/spring/actions/runs/8689807421/job/23828840294
This also appears to be the same issue: https://github.com/AntelopeIO/spring/actions/runs/8689807421/job/23828838734
https://github.com/AntelopeIO/spring/actions/runs/8691092550/job/23833120953

[ericpassmore]

Note:start
group: IF
category: INTERNALS
summary: Fix stuck in peer syncing state. Delay sending in_sync until controller state is caught up to head, and judiciously apply sync states, and do not directly jump to in sync state.
Note:end