v0.18.4.0 release to-do list

[selsta]

The following pull requests have to be merged and issues have to be resolved.

• build: prepare v0.18.4.0 #9722
• depends: boost: update to 1.66.0 [RELEASE] #9687
• blockchain sync: reduce disk writes from 2 to 1 per tx [RELEASE] #9740
• Some cleanup in span/connection_context + few more checks [0.18] #9759
• wallet: background sync with just the view key [release] #8617
• Set response limits on http server connections [0.18] #9775
• p2p/net_node.inl : update seed node [release v0.18] #9793
• p2p functional test failure #9755

Any other PRs that I'm missing?