Migrate flex cable example to EDB + 3D Layout

### deployment template

rep-core

### Bug description

The flex cable example in ``high_frequency/emc/flex_cable.py`` should be updated to use the flex bending capability in HFSS 3D Layout.

### Expected Behavior

The 3D layout UI now supports flex bending. This should be reflected in the example

### Steps to reproduce

_No response_

### Relevant log output

```shell

```

Start with high_frequency/emc/flex_cable.py and review how the current flex cable example is built. Compare it with the EDB and HFSS 3D Layout flex-bending capability described in the issue. Done means the example reflects flex bending supported by the 3D layout UI.

Written by the indexing model from the issue text.