Update Usage Ping Guide page based on initial review
Issue description
This page describes product documentation work that was identified during a documentation review of documentation pages associated with the Growth:Product Intelligence stage/group.
Page: https://docs.gitlab.com/ee/development/usage_ping/index.html
Identified items
- This page should be split apart. It's getting unwieldy.
- Cross-link to Snowplow.
- https://docs.gitlab.com/ee/development/usage_ping/index.html#usage-ping-request-flow this diagram needs line breaks to be readable
- Take numbers out of http://localhost:3000/ee/development/usage_ping/index.html#usage-ping-metric-life-cycle subheadings
- https://docs.gitlab.com/ee/development/usage_ping/index.html#implementing-usage-ping could be a new page just to get the batch counters moved away
- https://docs.gitlab.com/ee/development/usage_ping/index.html#developing-and-testing-usage-ping could be a new page