[NPU][Properties] Remove INTERNAL_SUPPORTED_PROPERTIES property (#32841)
### Details:
- Removes INTERNAL_SUPPORTED_PROPERTIES option
- Internal vector remains untouched at:
[_internalSupportedProperties](https://github.com/openvinotoolkit/openvino/blob/cf7699d7b3f028bc805c9b6f5d582c289055b723/src/plugins/intel_npu/src/plugin/include/properties.hpp#L142)
### Tickets:
- C 175471