[UX Writing] Observability onboarding content review

[mdbirnstiehl]

The new observability onboarding page needs another round of reviews.

A couple of points to focus on:

the main page:

The view collection button:

From Christian:

This View collection button is going to group integrations, e.g. aws integrations, azure, etc I wrote myself collection, but if you think something else can be better, please feel free to make suggestions

figma