[Synthetics] [Design] Update TLS view to be more scalable

[justinkambic]

Today, in the TLS view in Synthetics, we list an unbounded number of monitors inside the entries of the TLS table. These monitor names are useful to populate because they can link the user directly to the details page.

Unfortunately, because the TLS table is keyed in on the certificate hash and not monitor ID, there's a many-to-one relationship between monitor:cert. Monitors tracking the same certificate (i.e. numerous monitors for a single website) can flood this row with an unbounded number of monitors. Example:

We should revise this view to not display an unbounded number of monitors, but truncate after a pre-determined number of them, and let the user expand some control to View all instead.

[elasticmachine]

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

[elasticmachine]

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