[MNG-8472] Sort out the problem about packaging in Maven 4

**[Tamas Cservenak](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=cstamas)** opened **[MNG-8472](https://issues.apache.org/jira/browse/MNG-8472?redirect=false)** and commented

In past, several (opposite) efforts were done regarding "packaging" handling in Maven: either have them all in core, or have them all in plugins (none worked), and today we stopped somewhere in the middle.
See issues MNG-5697 and MNG-7832 for example (but I bet there are more related issues).

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**Issue Links:**
- [MNG-7832](https://issues.apache.org/jira/browse/MNG-7832) revert artifact handlers move to plugins
(_**"is caused by"**_)
- [MNG-5697](https://issues.apache.org/jira/browse/MNG-5697) remove LifecycleMapping and ArtifactHandler from maven-core: move to target packaging plugin
(_**"is caused by"**_)