fix: remove default maven central registry

[Chumper]

Changes:

Removes that the maven central url is added by default to all maven dependencies.

Context:

Closes #13925

According to the maven repository page this is a valid approach.

 By default, Maven will download from the central repository.

To me this means that if a repository is defined, it will take the place of the default.
In the test we have a simple pom which declares a repository, which will result in the maven repository not being added to the dependency.

However this could be a breaking change for repos that do not follow this approach but instead use maven central as default and add repositories on top of that.

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I have verified these changes via:

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• 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 31.66.6 🎉

The release is available on:

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