Make config python script detect hash collisions

### What

Since PR https://github.com/eclipse-score/lifecycle/pull/527 we have a portable hashing function to get the hash of the run-targets. Currently we assume that no hash collisions happen which is a bit unsafe. But with the changes we could validate that no hash collisions happen in the python script that is ran to validate configs [lifecycle_config.py](https://github.com/eclipse-score/lifecycle/blob/main/scripts/config_mapping/lifecycle_config.py) by implementing the same hashing function in python.
I think for now it shall just exit and communicate the error, I don't think we should append or modify the name since we might get into weird behaviour.

### Acceptance Criteria (DoD)

- Script validates names and exits 1 if a hash collision is detected.

### How

_No response_

Start in scripts/config_mapping/lifecycle_config.py and review PR 527 for the portable run-target hashing function. Implement the equivalent hashing and collision validation in the config-validation script. Done means the script detects duplicate hashes, communicates the collision, and exits with status 1.

Written by the indexing model from the issue text.