[Tests] apis UI Counters UI remove dependency on date

[Bamieh]

Summary

Remove the dependency on serializing the day to find saved objects by id since this seems to be the source of flakiness.

I suspect it has to do with the timing of when the test was run or timezones because the CI was reported on October 3rd at 3 am but the counter shows October 2nd so it is failing to grab the saved object by id.

This change clears all saved objects before each test and searches for matching events by event name and counter name rather than serializing the saved object ID manually to find it.

Closes #98240

• Tested running this at 3am which is when the failure was happening and it worked
• Ran CI several times

[Bamieh]

@elasticmachine merge upstream

[Bamieh]

@elasticmachine merge upstream

[Bamieh]

@elasticmachine merge upstream

[afharo]

LGTM! It looks like we were setting dayDate at the beginning of the test. So on midnight, some of the tests may run after midnight, and we'd be looking for the previous-day events.

This solution seems more rock-solid.

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: ee271fe

Metrics [docs]

✅ unchanged

History

• 💚 Build #174663 succeeded 08ff58b
• 💚 Build #173968 succeeded 8f0eace
• 💛 Build #173795 was flaky 6edccf0
• 💔 Build #173790 failed 2ef0a60

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@elasticmachine merge upstream