132 example data and scripts not unified

[MedericFourmy]

• Refactor inference example scripts and cosy/megapose tests
• Deprecate crackers example in favor of barbecue-sauce

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 20.27335% with 350 lines in your changes are missing coverage. Please review.

Project coverage is 24.92%. Comparing base (67d74ce) to head (eb0b8d0).

:exclamation: Current head eb0b8d0 differs from pull request most recent head 902416e. Consider uploading reports for the commit 902416e to get more accurate results

Files	Patch %	Lines
...stimators/cosypose/cosypose/training/evaluation.py	0.00%	141 Missing :warning:
...ypose/toolbox/inference/example_inference_utils.py	38.63%	54 Missing :warning:
...ypose/cosypose/scripts/run_inference_on_example.py	0.00%	42 Missing :warning:
...ators/megapose/scripts/run_inference_on_example.py	0.00%	42 Missing :warning:
...mators/cosypose/cosypose/utils/cosypose_wrapper.py	0.00%	23 Missing :warning:
...osypose/cosypose/scripts/convert_models_to_urdf.py	0.00%	10 Missing :warning:
...stimators/cosypose/cosypose/training/train_pose.py	0.00%	6 Missing :warning:
...ors/cosypose/cosypose/lib3d/rigid_mesh_database.py	0.00%	5 Missing :warning:
.../cosypose/cosypose/datasets/bop_object_datasets.py	33.33%	4 Missing :warning:
happypose/toolbox/inference/types.py	33.33%	4 Missing :warning:
... and 8 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #139 +/- ## ========================================== + Coverage 24.48% 24.92% +0.44% ========================================== Files 211 214 +3 Lines 17650 17728 +78 ========================================== + Hits 4321 4419 +98 + Misses 13329 13309 -20 ```

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[nim65s]

@codecov: you're making this review super hard, while not being super useful…