[8.16](backport #41524) update elastic-agent-system-metrics (#41623)

* update elastic-agent-system-metrics (#41524)

* chore: go.mod

* Notice

* go.mod

* chore: fix CI failure

* lint

* bug

* go.mod

* notice

(cherry picked from commit c07fffe)

# Conflicts:
#	go.mod
#	go.sum

* fix merge conflicts

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Co-authored-by: Vihas Makwana <121151420+VihasMakwana@users.noreply.github.com>
Co-authored-by: Vihas Makwana <vihas.makwana@elastic.co>