Revamp/1002 mavenartifactdownloader should interpret relocations

[fabapp2]

Debugging the dependency resolution showed that:

• The URI for dependencies is built in MavenArtifactDownloader
• The URI always points to the jar dependency
• This results in a broken URL for relocated dependencies like java:mysql-connector-java:8.0.33
• To fix this in the ArtifactDownloader the downloadArtifact() method would need to be refactored
  • One solution might be to check the (previously) downloaded pom when the download returned a 404.
  • And if a relocation is found use the relocation-information from the pom and try another download
• Another solution would be a general recipe (Recipe to search and provide a report of relocated dependencies openrewrite/rewrite-java-dependencies#58)
• A temporary fix for SpringPetclinic Upgrade recipe from 2.5 - 2.6 would solve it for the given application (but not for others)

See openrewrite/rewrite-java-dependencies#58

[timtebeek]

You might be interested to see the work done in this PR to parse & match a list of relocated artifacts

• Find relocated dependencies openrewrite/rewrite-java-dependencies#59