Added support for SNAL attack

[CNOCycle]

Description

This pull request adds the support of the SNAL Attack proposed in [1].

[1]Steal Now and Attack Later: Evaluating Robustness of Object Detection against Black-box Adversarial Attacks. [Paper] Fixes # (issue)

Type of change

Please check all relevant options.

• [ ] Improvement (non-breaking)
• [ ] Bug fix (non-breaking)
• [X] New feature (non-breaking)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Testing

Please describe the tests that you ran to verify your changes. Consider listing any relevant details of your test configuration.

• [X] Notebook Example

Test Configuration:

• OS: Ubuntu 20.04
• Python version: 3.8.12
• ART version or commit number: 900f4700
• PyTorch version: 1.13.1+cu116
• cudnn version: 8302

Checklist

• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [X] I have commented my code
• [X] I have made corresponding changes to the documentation
• [X] My changes generate no new warnings
• [X] I have added tests that prove my fix is effective or that my feature works
• [X] New and existing unit tests pass locally with my changes
• [X] My changes have been tested using both CPU and GPU devices

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 89.65517% with 48 lines in your changes missing coverage. Please review.

Project coverage is 85.31%. Comparing base (7983374) to head (ce3aec7).

Files with missing lines	Patch %	Lines
...n/steal_now_attack_later/steal_now_attack_later.py	90.14%	28 Missing and 14 partials :warning:
...cks/evasion/steal_now_attack_later/drop_block2d.py	75.00%	2 Missing and 2 partials :warning:
...mators/object_detection/pytorch_object_detector.py	84.61%	1 Missing and 1 partial :warning:

Additional details and impacted files

@@              Coverage Diff               @@
##           dev_1.19.0    #2440      +/-   ##
==============================================
+ Coverage       85.25%   85.31%   +0.06%     
==============================================
  Files             330      333       +3     
  Lines           30470    30930     +460     
  Branches         5228     5294      +66     
==============================================
+ Hits            25977    26388     +411     
- Misses           3042     3074      +32     
- Partials         1451     1468      +17     

Files with missing lines	Coverage Δ
art/attacks/evasion/__init__.py	100.00% <100.00%> (ø)
...attacks/evasion/steal_now_attack_later/bbox_ioa.py	100.00% <100.00%> (ø)
art/estimators/object_detection/pytorch_yolo.py	87.23% <ø> (ø)
...mators/object_detection/pytorch_object_detector.py	89.44% <84.61%> (-0.56%)	:arrow_down:
...cks/evasion/steal_now_attack_later/drop_block2d.py	75.00% <75.00%> (ø)
...n/steal_now_attack_later/steal_now_attack_later.py	90.14% <90.14%> (ø)

... and 3 files with indirect coverage changes