metal3: Link BareMetalHost and Metal3Machine details to each other

[mastermaxx03]

Summary

Makes the link between a BareMetalHost and its Metal3Machine clickable in the detail views. A host is consumed by a machine, and the machine records which host it claimed, so this lets you click straight from one to the other instead of copying a name and searching for it. First piece of the resource chain.

Included

• On the BareMetalHost detail, the Consumer field links to its Metal3Machine when the consumer is one; other consumer kinds stay plain text.
• On the Metal3Machine detail, the BareMetalHost field links to the host it claimed, read from the metal3.io/BareMetalHost annotation.
• A small parseHostAnnotation helper with unit tests for the "namespace/name" parsing.

How to test

• A cluster with the Metal3 and CAPM3 CRDs installed, a host with a consumerRef pointing at a Metal3Machine, and that machine carrying the metal3.io/BareMetalHost annotation.
• cd metal3 && npm install && npm start, then run Headlamp.
• Open a BareMetalHost that has a consumer, click the Consumer link to reach its Metal3Machine, then click that machine's BareMetalHost link back.

[mastermaxx03]

@illume @Rozzii

[Copilot]

Pull request overview

Adds cross-navigation between Metal3 resources in the Headlamp Metal3 plugin so users can quickly jump between a BareMetalHost and the Metal3Machine that consumes/claims it (and vice versa), reducing manual copy/search workflows. This PR also includes the stacked Metal3Machine/Metal3MachineTemplate views and supporting helpers/tests needed for the navigation to be usable end-to-end.

Changes:

• Link BareMetalHost.spec.consumerRef to the Metal3Machine detail view when the consumer kind is Metal3Machine.
• Link Metal3Machine detail view back to its claimed BareMetalHost by parsing the metal3.io/BareMetalHost annotation (namespace/name), with unit tests.
• Add Metal3MachineTemplate list/detail views (including a formatted hostSelector summary + tests), expand Metal3 sidebar/routes, and include sample YAML for local testing.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
metal3/src/BareMetalHost/Details.tsx	Makes the Consumer field clickable when it references a Metal3Machine.
metal3/src/Metal3Machine/Details.tsx	Adds a BareMetalHost field that links to the claimed host when the annotation parses as namespace/name.
metal3/src/Metal3Machine/hostAnnotation.ts	Introduces HOST_ANNOTATION constant and parseHostAnnotation helper used by the detail link logic.
metal3/src/Metal3Machine/hostAnnotation.test.ts	Unit tests for parseHostAnnotation parsing/validation behavior.
metal3/src/index.tsx	Registers sidebar entries and routes for Metal3Machines and Metal3MachineTemplates; updates baremetalhosts route sidebar key.
metal3/src/Metal3Machine/List.tsx	Adds Metal3Machine list view with provisioned/providerID/cluster columns.
metal3/src/Metal3MachineTemplate/List.tsx	Adds Metal3MachineTemplate list view including formatted hostSelector and other key columns.
metal3/src/Metal3MachineTemplate/Details.tsx	Adds Metal3MachineTemplate detail view with key blueprint fields.
metal3/src/Metal3MachineTemplate/hostSelector.ts	Adds formatHostSelector helper for a stable, readable selector summary.
metal3/src/Metal3MachineTemplate/hostSelector.test.ts	Unit tests for formatHostSelector.
metal3/test-files/metal3machine.yaml	Adds sample Metal3Machine/Metal3MachineTemplate objects demonstrating the host annotation and template fields.

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