IF: Add block extension which contains latest HotStuff commitment known to proposer #4365

Job	Run time
Discover Versions	2s
Run Platforms Workflow / Discover Platforms	3s
Run Platforms Workflow / Platform Matrix	4s
Run Platforms Workflow / Build Platforms	0s
Run Build Workflow / Build leap (ubuntu20)	6m 40s
Run Build Workflow / Build leap (ubuntu22)	6m 42s
Build leap-dev package (ubuntu20)	10m 16s
Build leap-dev package (ubuntu22)	9m 47s
NP Tests (ubuntu20)	14m 36s
NP Tests (ubuntu22)	14m 39s
LR Tests (ubuntu20)	29m 41s
LR Tests (ubuntu22)	32m 56s
Tests (ubuntu20)	3m 1s
Tests (ubuntu22)	3m 10s
libtester tests (ubuntu20, build-tree)	5m 56s
libtester tests (ubuntu20, make-dev-install)	6m 11s
libtester tests (ubuntu20, deb-install)	2m 13s
libtester tests (ubuntu22, build-tree)	5m 53s
libtester tests (ubuntu22, make-dev-install)	6m 22s
libtester tests (ubuntu22, deb-install)	4m 31s
All Required Tests Passed	1s
	2h 42m 44s

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