[Inventory] Add sharing button

[smith]

In order to share links to the inventory with other users, there should be a share button that gives the users the option of sharing a URL to the page

Use the share plugin to add this.

✔ Acceptance criteria

• A share button is in the top menu
• It allows users to share a short link to the page.

[elasticmachine]

Pinging @elastic/obs-ux-infra_services-team (Team:obs-ux-infra_services)

[crespocarlos]

I think this depends on #192329. We need first to store the search data in the querystring to make sure the sharing works.