chore: checkfiles with yarn install

[hacker65536]

Add option --check-files to yarn install

related #4588

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[RomainMuller]

Changed this to using the .yarnrc file instead. This allows to avoid surprises when people manually run yarn install as it does not appear this check is particularly expensive in our case.

I've removed the engine checks opt-out, too, as this should no longer be required.

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