feat(helm-values): Support for bumpVersion

[chgl]

Changes:

Implements the bumpPackageVersion interface for the helm-values manager. Because helm-values' packageFile is different from the file containing the version to be bumped (the Chart.yaml) this required adding support for decoupling the two. For now, only one additional bumpVersionPackageFile is supported, if the need arises it would probably be cleanest to provide a list of files that will need to be updated should the version be bumped.

I've tested it in the repo here: https://github.com/chgl/renovate-helm-values-bumpversion-test/pull/5/files and it seems to work.

Context:

Closes #8231

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[rarkins]

Small types change

[rarkins]

A potential problem in future (not affecting this functionality I think) is that the Chart.yaml could have already been updated by Renovate and if we read it from disk in this bumpPackageVersion function then we'll get the pre-updated version and not the updated one. But that's a bigger problem to solve.

[chgl]

A potential problem in future (not affecting this functionality I think) is that the Chart.yaml could have already been updated by Renovate and if we read it from disk in this bumpPackageVersion function then we'll get the pre-updated version and not the updated one. But that's a bigger problem to solve.

Agreed! In this case, the helmv3 manager is able to bump the version of Chart.yaml as well, however since bumpVersion is a global setting, both this and the helmv3 manager would try to bump the version to the same value, overriding each other but still arriving at the same version.

Is there anything else I could improve or address for this PR?

[renovate-release]

🎉 This PR is included in version 24.67.0 🎉

The release is available on:

• GitHub release
• 24.67.0

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