patch: dedupe on ci

[aethernet]

run npm dd as a postinstall step

[thgreasi]

I don't think that's a good idea, since postinstall runs on consumer's side as well
See: https://docs.npmjs.com/cli/v9/using-npm/scripts

[aethernet]

@thgreasi why is that a problem?

[thgreasi]

@aethernet for first it will slow down npm i -g balena-cli considerably, and it will also potentially update the local dependencies thus having them diverge from the ones that the shrinkwrap included.