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ARROW-6103: [Release][Java] Remove mvn release plugin

We want to stop using the maven release plugin because it commits to the repo both in the `prepare` and `perform` tasks and adds complexity to the release process.

This PR removes the plugin and updates the release preparation script to use the maven versions plugin to update the version number in the pom files.

We will need to run `mvn deploy` to publish the artifacts and I'm not sure where that needs to happen (`mvn release:perform` was previously invoking the `deploy` phase).

Closes #9155 from andygrove/remove-mvn-release-plugin

Lead-authored-by: Krisztián Szűcs <szucs.krisztian@gmail.com>
Co-authored-by: Andy Grove <andygrove73@gmail.com>
Signed-off-by: Krisztián Szűcs <szucs.krisztian@gmail.com>