[Backport] added min=0 to qty field product detail page

[amol2jcommerce]

Original Pull Request

#21055

Description (*)

On product detail page it is possible to go to minus values using keyboard. Once the add to cart button is clicked validation error - "Please enter a quantity greater than 0" shown.

Manual testing scenarios (*)

1.Go to product detail page
2. Decrease the qty by using arrow keys

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 on Travis CI are green)

[magento-engcom-team]

Hi @amol2jcommerce. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
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[magento-engcom-team]

Hi @dmytro-ch, thank you for the review.
ENGCOM-4252 has been created to process this Pull Request

[ghost]

Hi @amol2jcommerce, thank you for your contribution!
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