Wave v1.7.2

Feature updates and improvements

• Remove deprecated metrics v1alpha1 by @pditommaso in https://github.com/seqeralabs/wave/pull/467
• Add document how metrics counter works by @munishchouhan in https://github.com/seqeralabs/wave/pull/470
• Use IO executor consistently by @pditommaso in https://github.com/seqeralabs/wave/pull/471
• Update metric service to get aggregated metrics by @munishchouhan in https://github.com/seqeralabs/wave/pull/472

Full changelog: https://github.com/seqeralabs/wave/compare/v1.7.1...v1.7.2