[Uptime] Header layout changes

[shahzad31]

Describe the feature:

Following APM #81954

We also need to move links to header action menue following docs , https://github.com/elastic/kibana/blob/981691d378cf6bce738d8d30f568f2f407468e29/docs/development/core/public/kibana-plugin-core-public.appmountparameters.setheaderactionmenu.md

Also use condesed tabs to display certificate and overview page and settings, as done in metrics/logs app.

This will bring uptime header layout on par with other observability app.

Describe a specific use case for the feature:

[elasticmachine]

Pinging @elastic/uptime (Team:uptime)

[paulb-elastic]

@shahzad31 as per https://github.com/elastic/observability-dev/issues/150#issuecomment-734455427 there is a change in design approach across Observability, so worth postponing until we have a clearer picture.

[formgeist]

@shahzad31 @paulb-elastic Even though we are working on a new navigation concept for Observability, I would actually like to align the apps and use the new Kibana menu space for these types of actions. This is already implemented in APM and the Observability overview, pending implementation in Logs and Metrics. The tab style is also good 👍

[shahzad31]

Yes i agree with kasper thought process here.