Update Logstash single pipeline dashboard with batch byte_size metrics for p50 p90 max

[andsel]

Proposed commit message

Update the cel script to store p50 p90 and max byte size metrics of the batch for the last minute.
Update the Single Pipeline View to include these new values.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.
• I have verified that any added dashboard complies with Kibana's Dashboard good practices

Author's Checklist

• [ ]

How to test this PR locally

Follow the test plan shaped in #17009

Related issues

• Closes Update the Elastic integration to present p50 p90 and max batch byte size metrics logstash#18972

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cc @andsel

[robbavey]

Couple of concerns about presentation:

I'm not sure about having multiple areas, and why p50 and p90 are represented by areas, but max is not. WDYT about only p50 being represented by area, or nothing?

average lifetime is difficult to read on this graph too

[andsel]

I imagined p50 an p90 as areas because those make immediately visible the where the current and max are respect to the range that should contains the majority of the measures.
I tried to add also max as an area, but the graph became too much cluttered, because max is an upper limit, I think it's fine to be a line.

If we keep all percentiles plus current and average as lines, the graph it's hard to understand, you have to consider 5 lines and understanding the relationship it's not easy.
The areas permit an immediate separation between percentiles and current, average values.
Let me know if you think that we are presenting too much information in a single graph. I think that the idea of the graph is to provide how current and average relates to percentiles in a glipse.

[robbavey]

@perk @jsvd Do you have any thoughts here?