chore: remove publications

[ronjaquensel]

What this PR changes/adds

Removes the Maven publications from the build files and sets the publish flag to false for modules that should not be published (launchers, system tests).

Why it does that

Once this PR is merged, Maven publications will be added automatically by the Plugin.

Further notes

Renamed modules, so that the module name matches the artifact ID:

• identity-hub-verifier to identity-hub-credentials-verifier
• client-cli to identity-hub-cli

Checklist

• added appropriate tests?
• performed checkstyle check locally?
• added/updated copyright headers?
• documented public classes/methods?
• added/updated relevant documentation?
• added relevant details to the changelog? (skip with label no-changelog)
• formatted title correctly? (take a look at the CONTRIBUTING and styleguide for details)

[github-actions]

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