chore: start using unclog on release/v9.1.x

[mpoke]

Description

Closes: NA

Related to #2604

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[MSalopek]

Maybe we should start using unclog from versions >= v10.x.x to have a clean cut between versions that have it and ones that don't?

[MSalopek]

LGTM!

[mpoke]

Maybe we should start using unclog from versions >= v10.x.x to have a clean cut between versions that have it and ones that don't?

We'll maintain v9.1.x until v11 will be released. Having different methods to deal with the changelog would make backporting fixes very difficult.