Integrate RMK with the vals tool for enhanced values and secret management

[anovikov-el]

Description

vals is a tool for managing configuration values and secrets.

It supports various backends including:

• AWS Secrets Manager
• SOPS
• Kubernetes
• Terraform state
• many more

See the full list of the backends: https://github.com/helmfile/vals?tab=readme-ov-file#supported-backends

While helmfile supports it out of box, it should be checked from the RMK side including how autorisation work, whether all the needed envs are exported correctly etc.

A good starting point will be AWS Secrets Manager.
The main scenario:
A customer adds all secrets directly to his AWS Secrets Manager without using SOPS secrets, committed to Git.

Steps to reproduce

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Expected behaviour

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Actual behaviour

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Environment info

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