Fix zipball/tarball name ignoring the name and version properties

[commi]

Since c8f54bf the maven zip/tar name comes from build.finalName instead of the packager's name and version.

So name has no effect on the archive name. With two package executions in one build, both write the same file. On Linux the second one overwrites the first. On Windows the rename fails and the archive keeps the name ${build.finalName}.zip:

before:  my-app-1.0.0-windows.zip   (first execution)
         my-app-1.0.0.zip           (second execution, contains my-tool)

after:   my-app-1.0.0-windows.zip
         my-tool-1.0.0-windows.zip

The README documents ${name}-${version}-${platform}.zip, and the gradle plugin still creates that name. This PR updates the maven plugin so it behaves the same way.

The rename is still there, so the read-only finalName warning from c8f54bf does not come back. It now replaces an existing file, because File.renameTo does not do that on Windows. Otherwise a rebuild without clean keeps the old archive.

zipballName and tarballName still work as before. For projects where name is not the artifactId, the default file name changes.