IF: Add block extension which contains latest HotStuff commitment known to proposer #4350

Job	Run time
Discover Versions	5s
Run Platforms Workflow / Discover Platforms	5s
Run Platforms Workflow / Platform Matrix	2s
Run Platforms Workflow / Build Platforms	0s
Run Build Workflow / Build leap (ubuntu20)	7m 11s
Run Build Workflow / Build leap (ubuntu22)	6m 57s
Build leap-dev package (ubuntu20)	13m 21s
Build leap-dev package (ubuntu22)	8m 39s
Tests (ubuntu20)	3m 8s
Tests (ubuntu22)	3m 8s
NP Tests (ubuntu20)	5m 26s
NP Tests (ubuntu22)	4m 30s
LR Tests (ubuntu20)	24m 4s
LR Tests (ubuntu22)	23m 43s
libtester tests (ubuntu20, build-tree)	4m 31s
libtester tests (ubuntu20, make-dev-install)	9m 7s
libtester tests (ubuntu20, deb-install)	1m 34s
libtester tests (ubuntu22, build-tree)	5m 15s
libtester tests (ubuntu22, make-dev-install)	8m 10s
libtester tests (ubuntu22, deb-install)	4m 9s
All Required Tests Passed	3s
	2h 13m 8s

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