Load attributes data of attribute-meta for bundled and grouped products

[cewald]

Short Description and Why It's Useful

If I want to show product attribute options of a bundled or grouped products on PDP, the attribute data isn't loaded. But as we already load the children in setGroupedProduct and setBundleProducts we can use the data of the product link request to populate the attributes options data in case it is used. E.g. to show the selected options in the shopping cart.

I added two events hooks: afterSetGroupedProduct and afterSetBundleProducts on which I bound a helper class (getAttributesFromMetadata ) using the attribute/loadProductAttributes action to load the attribute data from response data.

Which Environment This Relates To

Check your case. In case of any doubts please read about Release Cycle

• Test version (https://test.storefrontcloud.io) - this is a new feature or improvement for Vue Storefront. I've created branch from develop branch and want to merge it back to develop
• RC version (https://next.storefrontcloud.io) - this is a stabilisation fix for Release Candidate of Vue Storefront. I've created branch from release branch and want to merge it back to release
• Stable version (https://demo.storefrontcloud.io) - this is an important fix for current stable version. I've created branch from hotfix or master branch and want to merge it back to hotfix

Upgrade Notes and Changelog

• No upgrade steps required (100% backward compatibility and no breaking changes)
• I've updated the Upgrade notes and Changelog on how to port existing Vue Storefront sites with this new feature

IMPORTANT NOTICE - Remember to update CHANGELOG.md with description of your change

Contribution and Currently Important Rules Acceptance

• I read and followed contribution rules

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