[8.x](backport #6384) Update OTel v0.116.0 (#6390)

* Update OTel v0.116.0 (#6384)

* sed -i 's/\(go\.opentelemetry\.io\/collector.*\) v0\.115\.0/\1 v0.116.0/' go.mod

* sed -i 's/\(go\.opentelemetry\.io\/collector.*\) v1\.21\.0/\1 v1.22.0/' go.mod

* sed -i 's/\(github\.com\/open-telemetry\/opentelemetry\-collector\-contrib\/.*\) v0\.115\.0/\1 v0.116.0/' go.mod

* go mod tidy

* mage notice

* mage otel:readme

* add changelog entry

(cherry picked from commit b1fa909)

# Conflicts:
#	go.mod
#	go.sum

* fix backport conflicts

* go mod tidy

* mage notice

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Co-authored-by: Andrzej Stencel <[email protected]>