Provide Timestamp provider based on RemoteSnapshotMetadataGenerator

[laeubi]

Currently Tycho generates an own qualifier format for "snapshot" like builds, it would be good to have an option to align both.

https://github.com/apache/maven/blob/maven-3.9.x/maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/RemoteSnapshotMetadataGenerator.java