Adding support for images inside of helm value files as per helm convention.
Limitation: Default images the chart may propose are not exposed and therefore not supported, only what's specifically mentioned in the values file.
Reviewed-on: t.behrendt/trivy-actions#29
Reviewed-by: branch-buddy <branch-buddy@t00n.de>
Co-authored-by: t.behrendt <t.behrendt@t00n.de>
Co-committed-by: t.behrendt <t.behrendt@t00n.de>
