[Stack Monitoring] avoid multiple requests updating page data

[neptunian]

Summary

Resolves #111536
Reimplements #27253

#27253 was implemented because sometimes the requests for page data takes longer than the time interval. We want to not make a request if the current one is still pending.

Test

• Navigate to a stack monitoring app first
• Open dev tools and throttle your network to slow 3g so requests are slow to respond
• Set the interval to something very short like .5 seconds
  
• Look in the network tab that requests are not being made every .5 seconds or in parallel but as fast as they're able to return a response

[elasticmachine]

Pinging @elastic/logs-metrics-ui (Team:logs-metrics-ui)

[phillipb]

Brillant!

[neptunian]

@elasticmachine merge upstream

[kibanamachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 4f6b13f
• Storybooks Preview

Test Failures

• [job] [logs] Default CI Group #11 / detection engine api security and spaces enabled Rule exception operators for endpoints "is" operator should filter 1 value set as an endpoint exception and 1 value set as a normal rule exception

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
monitoring	486.3KB	486.4KB	+75.0B

History

• 💚 Build #1088 succeeded e40f072

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

cc @neptunian

[kibanamachine]

💚 Backport successful

Status	Branch	Result
✅	7.16

This backport PR will be merged automatically after passing CI.