[MNG-6753] MavenMetadataSource should not use ProjectBuilder

**[Robert Scholte](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=rfscholte)** opened **[MNG-6753](https://issues.apache.org/jira/browse/MNG-6753?redirect=false)** and commented

While working on MNG-6656 and analyzing which files will be transformed, I noticed that maven-surefire-plugin showed additional pom transformations. This is unwanted, only the reactor poms should be transformed
Root cause is the MavenMetadataSource, which is using the ProjectBuilder to assemble a ProjectRelocation. Having the effectiveModel should be more than enough.

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**Issue Links:**
- [MNG-6656](https://issues.apache.org/jira/browse/MNG-6656) Introduce base for build/consumer process

Start by inspecting MavenMetadataSource and how it uses ProjectBuilder to assemble a ProjectRelocation, then compare that path with the available effectiveModel. Reproduce the behavior while analyzing maven-surefire-plugin and reactor POM transformations; done means only reactor POMs are transformed.

Written by the indexing model from the issue text.