## What this PR does
The Helm hook that creates a job deleting all applications in a tenant
before deleting the tenant itself now runs this job from the cozy-system
namespace. This prevents conflicts with resource quotas (not enough
resources to run cleanup job) without temporary increases of the quota
or similar vulnerability-introducing hacks.
### Release note
```release-note
[tenant] Run cleanup job in system namespace to avoid conflicts on
resource quotas.
```
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Infrastructure Updates**
* Updated cleanup job namespace targeting to use a fixed system
configuration
* Adjusted cleanup job execution priority level
<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>
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