V0.4 Release

This Release mainly introduces distributed support via Ginkgo v1.5.0 and adds support for simple cyclic boundary conditions.

What's Changed

• Permute on gpu by @greole in #60
• Device persisent vector by @greole in #63
• Repartition by @greole in #64
• Distributed update by @greole in #65
• Non symmetrix update by @greole in #66
• Repartition update by @greole in #68
• Fix compilation foundation version by @greole in #69
• use system openmpi by @greole in #70
• Fix adaptive stop by @greole in #71
• Multi gpu by @greole in #62
• Add non-symmetric assembly by @greole in #78
• trigger workflow by @greole in #79
• remove comment by @greole in #81
• Typos by @greole in #82
• Improve export by @greole in #86
• Fix processor interface coeffs by @greole in #87
• Improve error message for wrong precond choice by @greole in #84
• Improve backend stability by @greole in #85
• Cyclic by @greole in #80
• fix failing workflow by @greole in #88
• Gko 1.5.0 by @greole in #73
• Version 0.4 release by @greole in #89

Full Changelog: v0.3...v0.4.0