fix(manager/gradle): normalize aliases in versionCatalog

[Churro]

Changes

Dependency aliases in version catalogs are normalized by Gradle and can then use dot separators only (see here):

When declaring aliases, it’s worth noting that any of the -, _ and . characters can be used as separators, but the generated catalog will have all normalized to .: for example foo-bar as an alias is converted to foo.bar automatically.

This PR adds this normalization to the Gradle manager. This enables aliases with - or _ to be successfully resolved when used as variables. Until now, this only worked for aliases without these characters.

Context

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please tick one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[renovate-release]

🎉 This PR is included in version 33.0.1 🎉

The release is available on:

• GitHub release
• 33.0.1

Your semantic-release bot 📦🚀