Remove tag icon from container registry row component

Problem

The container registry row has lots of competing information. There is also some mixed signals in than the copy icon is interactive and the tag icon is illustrative.

Proposal

Remove some of the noise by removing the tag icon

Design vision

Attached below 🔻 and detailed in the parent epic

Implementation guide

• Remove the gl-icon line - https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/assets/javascripts/packages_and_registries/container_registry/explorer/components/list_page/image_list_row.vue#L155
• Change tagsCountText to return the text tags in lowercase - https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/assets/javascripts/packages_and_registries/container_registry/explorer/components/list_page/image_list_row.vue#L83-84