Remove the deprecated pod enrichment controller

[nightkr]

Description

Fixes #292

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
- [x] Helm chart can be installed and deployed operator works
- [x] Integration tests passed (for non trivial changes)

# Reviewer
- [ ] Code contains useful comments
- [ ] Code contains useful logging statements
- [ ] (Integration-)Test cases added
- [ ] Documentation added or updated. Follows the [style guide](https://docs.stackable.tech/home/nightly/contributor/docs/style-guide).
- [ ] 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
- [ ] [Roadmap](https://github.com/orgs/stackabletech/projects/25/views/1) has been updated

[nightkr]

Release note:

Pod enrichment [FIXME: change this to /24.11 in the actual release notes] has now been removed, after being deprecated in 24.11. Remaining users are encouraged to migrate to the Stackable Listener Operator instead, which makes fewer assumptions around how the Pod should be accessed.

[sbernauer]

Only on minor nit

[sbernauer]

@nightkr watch out, pre-commit failed

[nightkr]

Goddamnit.. fixed.

[sbernauer]

Thanks!