Add dedicated flux-tenants controller with label selector
--watch-label-selector=sharding.fluxcd.io/key=tenants to handle
tenant workloads separately from platform components.
Update all kubernetes app HelmReleases to:
- Use chartRef with ExternalArtifact instead of OCIRepository sourceRef
- Add sharding.fluxcd.io/key=tenants label
- Add cozystack.io/target-cluster-name label
Update fluxinstall to parse multiple YAML manifest files and
use flux service for storage-adv-addr.
Add cozystack-basics package for core tenant/namespace setup.
Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Andrei Kvapil <kvapss@gmail.com>
## What this PR does
This PR introduces a bare-bones Job backup strategy API type and stubs
out all the boilerplate for a new controller that will handle this
strategy, as well as any others in the `strategy.backups.cozystack.io`
API group.
### Release note
```release-note
[backups] Create stubs and minimal implmentations for controllers for
the strategy.backups.cozystack.io API group.
```
Signed-off-by: Timofei Larkin <lllamnyp@gmail.com>
