Change bulk actions screenshots filenames

[Roma36]

Description of the change

This PR is needed to prepare the grounds for screenshots generation using storybook.
No actual changes, just some file paths changed.

Checklist

Please make sure that the proposed change checks all the boxes below before requesting a review:

• I have reviewed the guidelines for contributing to this repository.
• The preview looks fine.
• The tests pass.
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• You have updated the navigation files correctly:
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  • Only nav.yaml has been updated because the changes only apply to SaaS, or;
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  • Both nav.yaml and nav.self-hosted.yaml have been updated.

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