FIX Update LinkField if Elemental version status was updated

[sabina-talipova]

Description

This fix updates the component if the elemental state has been updated.

Manual testing steps

• I create a new Elemental block with LinkField;
• I create a new Link;
• I see "Draft" badge in LinkField;
• I publish the block (not a Page);
• I still see "Draft" badge in LinkField;
• I refresh the Page and then a badge disappears.

Issues

• CMS 5.2.0-beta1. Regression test: LinkField has "Draft / Modified" label even when Elemental Block was published #256

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• CI is green

[sabina-talipova]

The failed test requires silverstripe/silverstripe-elemental#1160

[emteknetnz]

This is the fundamentally the wrong approach. This is creating a coupling between linkfield and elemental which are two optional modules.

The solution should be something more along the lines of:

1. elemental publishes/unpublishes the link
2. elemental forces a formSchema refetch (/admin/elemental-area/schema/elementForm/1) - I'm not sure the best way to go about this since it's tied closely to FormBuilder/redux-form
3. (hopefully) as part of that there's a call made to refetch linkfield data (/admin/linkfield/data?itemIDs[]={ids}) which contains the updated versioned status for the link