Studio is showing less commerce validation issues

Studio search can display commerce related validation issues, e.g if an augmented category cannot be found in the catalog. In the past, however, the studio showed a lot of errors if the commerce system was temporarily not available. Practically each commerce related content item (e.g. augmented categories, products, product teasers, product lists) appeared in the list as "invalid commerce id" issues. Now connectivity issues of the commerce adapter with the commerce system are recognized and no content issues are created. This feature requires a commerce adapter with a base adapter of at least version 2.2.x, because it propagates the gRPC response status UNAVAILABLE in case of connectivity issues with the commerce system.

(CMS-23038)