Reinitialize properties when deserializing

[klecki]

Category: Bug fix, Refactoring

Description:

First commit from #4096

When deserializing, the frontend values are not initialized. Initialize them based on the backend values.

Needed to fix another part of feed_input to deserialized pipelines.

An alternative would be to expose those properties directly from backend instead of copying them over.

TODO: Remaining properties.

Additional information:

Affected modules and functionalities:

Frontend Pipeline under deserialization.

Key points relevant for the review:

Tests:

• [ ] Existing tests apply
• [ x] New tests added
  • [x] Python tests
  • [ ] GTests
  • [ ] Benchmark
  • [ ] Other
• [ ] N/A

Checklist

Documentation

• [ ] Existing documentation applies
• [ ] Documentation updated
  • [ ] Docstring
  • [ ] Doxygen
  • [ ] RST
  • [ ] Jupyter
  • [ ] Other
• [x] N/A

DALI team only

Requirements

• [ ] Implements new requirements
• [ ] Affects existing requirements
• [ ] N/A

REQ IDs: N/A

JIRA TASK: N/A

[klecki]

This is a part of one of two possible solutions - changing to draft