Fix issue with scripts appearing next to single product buttons

[cristian-ungureanu]

Summary

• The issue here was that we targeted all elements in that div with > *. If a plugin come and add a script there, the script tag would have display: flex;
• Fixed an issue for grouped products. The padding of the primary button was applying to inputs for grouped products.

NOTE: You need to have https://github.com/Codeinwp/neve-pro-addon/pull/1431

Will affect visual aspect of the product

NO

Screenshots

https://prnt.sc/15otb1h

Test instructions

• Import test data from WooCommerce https://github.com/woocommerce/woocommerce/tree/master/sample-data
• check that buttons and quantity input has the same height
• Check on normal, variable, grouped, and external products
• Test with seamless add to cart
• Test with quick view modal
• Test with and without Neve Pro

Closes #2903, Closes #2901, Closes #2915, Closes codeinwp/neve-pro-addon#1414

[github-actions]

Plugin build for c1c67de is ready 🛎️!

• Download build

[selul]

@abaicus can you review the CSS changes here please.

[abaicus]

👍🏻

[pirate-bot]

🎉 This PR is included in version 3.0.0 🎉

The release is available on GitHub release

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