[1.0.2 -> main] SHiP: Fix hang on shutdown

[heifner]

state_history_plugin (SHiP) would sometimes hang on shutdown. The nodeos process would get stuck trying to lock a mutex of the main application io_context strand while destroying a boost::beast::websocket::stream.

Created a test that reproduces the failure (thanks @taokayan for #813). The failure was not reliably repeatable, but it did fail on every CI/CD run for at least one of the platforms. See for example: https://github.com/AntelopeIO/spring/actions/runs/11017331583/job/30595880305

Modified SHiP boost::beast::websocket to use the SHiP thread instead of the main application thread executor strand.

Merges release/1.0 into main including #816.

Resolves #815

[ericpassmore]

Note:start
category: Other
component: SHiP
summary: Fix hang on shutdown.
Note:end