Fix Cutout memory leak

[drauh]

Description

Fixes #2814

Type of change

• Bug fix
• New Tutorial
• Updated or additional documentation
• Additional Testing

Checklist:

• I've properly formatted my code according to the guidelines
  • By running Black + Flake8
  • By running pre-commit hooks
• This PR addresses an already submitted issue for TensorFlow Addons
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• This PR contains modifications to C++ custom-ops

How Has This Been Tested?

By running the code from the issue reproducing the memory leak, here are the outputs now:

1.32 GB
1.32 GB
1.32 GB
1.32 GB
1.32 GB
1.32 GB
1.32 GB
1.32 GB
1.32 GB
1.32 GB
1.32 GB
1.33 GB

[bot-of-gabrieldemarmiesse]

@fsx950223

You are owner of some files modified in this pull request.
Would you kindly review the changes whenever you have the time to?
Thank you very much.