[Forwardport] Unable to change attribute type from swatch

[nmalevanec]

Original Pull Request

#12771

Unable to change attribute type from swatch to dropdown

• fixed the process of switching attribute input type

Description

Fixed Magento _Swatches module.

Fixed Issues (if relevant)

1. Unable to change attribute type from swatch to dropdown  #12695: Unable to change attribute type from swatch to dropdown
2. Changing Swatches to Drop-down does not remove swatches from existing products #11703: Changing Swatches to Drop-down does not remove swatches from existing products
3. Color attribute taking swatch instead of Drop down option for configurable options, #9307: Color attribute taking swatch instead of Drop down option for configurable options
4. Product Attributes Not Updating on Frontend #11403: Product Attributes Not Updating on Frontend
5. Upgrading to 2.1.7 changed dropdown attributes to swatches #9923: Upgrading to 2.1.7 changed dropdown attributes to swatches

[magento-engcom-team]

Hi @nmalevanec. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
Add the comment under your pull request to deploy test or vanilla Magento instance:

• @magento-engcom-team give me test instance - deploy test instance based on PR changes
• @magento-engcom-team give me {$VERSION} instance - deploy vanilla Magento instance

For more details, please, review the Magento Contributor Assistant documentation

[magento-engcom-team]

Hi @VladimirZaets, thank you for the review.
ENGCOM-2870 has been created to process this Pull Request

[magento-engcom-team]

Hi @nmalevanec. Thank you for your contribution.
We will aim to release these changes as part of 2.3.0.
Please check the release notes for final confirmation.