Make kvp's Debug impls a lot more readable

[nightkr]

Description

Changes the output from:

Labels( KeyValuePairs( { KeyValuePair { key: Key { prefix: None, name: KeyName( "group", ), }, value: LabelValue( "default", ), }, KeyValuePair { key: Key { prefix: None, name: KeyName( "role", ), }, value: LabelValue( "namenode", ), }, KeyValuePair { key: Key { prefix: Some( KeyPrefix( "app.kubernetes.io", ), ), name: KeyName( "component", ), }, value: LabelValue( "namenode", ), }, KeyValuePair { key: Key { prefix: Some( KeyPrefix( "app.kubernetes.io", ), ), name: KeyName( "instance", ), }, value: LabelValue( "simple-hdfs", ), }, KeyValuePair { key: Key { prefix: Some( KeyPrefix( "app.kubernetes.io", ), ), name: KeyName( "name", ), }, value: LabelValue( "hdfs", ), }, KeyValuePair { key: Key { prefix: Some( KeyPrefix( "app.kubernetes.io", ), ), name: KeyName( "role-group", ), }, value: LabelValue( "default", ), }, }, ), )

To:

Labels( KeyValuePairs( { "group": "default", "role": "namenode", "app.kubernetes.io"/"component": "namenode", "app.kubernetes.io"/"instance": "simple-hdfs", "app.kubernetes.io"/"name": "hdfs", "app.kubernetes.io"/"role-group": "default", }, ), )

The useful information is still there, it's just.. a lot more readable if we cut away the fluff.

Definition of Done Checklist

• Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant
• Please make sure all these things are done and tick the boxes

# Author - [ ] Changes are OpenShift compatible - [ ] CRD changes approved - [ ] Integration tests passed (for non trivial changes) 

# Reviewer - [ ] Code contains useful comments - [ ] (Integration-)Test cases added - [ ] Documentation added or updated - [ ] Changelog updated - [ ] Cargo.toml only contains references to git tags (not specific commits or branches) 

# Acceptance - [ ] Feature Tracker has been updated - [ ] Proper release label has been added