Helm Charts are still referring to product-edc container images

[florianrusch-zf]

Describe the bug

The helm charts within this repository are still referring to the container images of the catena-x/product-edc github repository.

Expected behavior

After the first "real" release in this repository with published container images we should change this! (Or even right before it 😅)

[stephanbcbauer]

@florianrusch-zf I think this is already done?