[WIP] : Additional class option added for masonry grid

[konarshankar07]

Description (*)

This PR is regarding ASI (adobe stock integration) repo issue in which we need to require add some additional classes which can be useful for styling masonry grid with unique class

Fixed Issues (if relevant)

1. Update media gallery grid styles to match the mockups adobe-stock-integration#828: Update media gallery grid styles to match the mockups

Questions or comments

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)

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[magento-engcom-team]

Hi @rogyar, thank you for the review.
ENGCOM-6526 has been created to process this Pull Request

[sivaschenko]

@konarshankar07 I think these changes are not necessary, please see the conversation here magento/adobe-stock-integration#828 (comment)

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