Fix upsert of custom search bar types

To use the sw-search-bar with custom entities, you need to add (upsert) a new search type. When using the respective upsert function of the SearchTypeService, the configuration of the custom type is stored in a configuration property:

https://github.com/shopware/platform/blob/27558b4c00452ba25c5f99de42da37144b37e723/src/Administration/Resources/administration/src/app/service/search-type.service.js#L57-L59

The upsert call

searchTypeService.upsertType(
    'some_custom_entity',
    {
        entityName: 'some_custom_entity',
        ...
    }
 );

will result in

const $typeStore = {
...
    some_custom_entity: {
        configuration: {
            entityName: 'product',
            ...
        },
    },
...
}

Whereas no such configuration property is present in the default types here: https://github.com/shopware/platform/blob/27558b4c00452ba25c5f99de42da37144b37e723/src/Administration/Resources/administration/src/app/service/search-type.service.js#L14-L19

and not used in the sw-search-bar here: https://github.com/shopware/platform/blob/9ad84b26097c066ac9120953517008ccf5233c05/src/Administration/Resources/administration/src/app/component/structure/sw-search-bar/index.js#L88

This is caused by an incorrect usage of the spread operator at https://github.com/shopware/platform/blob/27558b4c00452ba25c5f99de42da37144b37e723/src/Administration/Resources/administration/src/app/service/search-type.service.js#L58, which this PR fixes.

pickware / shopware-platform

Fix upsert of custom search bar types #8