IF: Add block extension which contains latest HotStuff commitment known to proposer #4351

Job	Run time
Discover Versions	4s
Run Platforms Workflow / Discover Platforms	3s
Run Platforms Workflow / Platform Matrix	2s
Run Platforms Workflow / Build Platforms	0s
Run Build Workflow / Build leap (ubuntu20)	8m 12s
Run Build Workflow / Build leap (ubuntu22)	6m 44s
Tests (ubuntu20)	3m 3s
Tests (ubuntu22)	3m 9s
NP Tests (ubuntu20)	5m 39s
NP Tests (ubuntu22)	4m 28s
LR Tests (ubuntu20)	23m 47s
LR Tests (ubuntu22)	23m 39s
Build leap-dev package (ubuntu20)	13m 39s
Build leap-dev package (ubuntu22)	12m 35s
libtester tests (ubuntu20, build-tree)	5m 9s
libtester tests (ubuntu20, make-dev-install)	9m 2s
libtester tests (ubuntu20, deb-install)	1m 54s
libtester tests (ubuntu22, build-tree)	5m 34s
libtester tests (ubuntu22, make-dev-install)	7m 31s
libtester tests (ubuntu22, deb-install)	4m 3s
All Required Tests Passed	1s
	2h 18m 18s

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