Use Multi-Release JAR instead of reflection for decompression

[wendigo]

Since we've moved to JDK 11 we can now use multi-release JAR

Description

Additional context and related issues

Release notes

( ) This is not user-visible or is docs only, and no release notes are required. ( ) Release notes are required. Please propose a release note for me. ( ) Release notes are required, with the following suggested text:

## Section
* Fix some things. ({issue}`issuenumber`)