feat: add back minBarHeight on discover histogram

[nickofthyme]

Summary

Adds back min bar height to discover for large document count variances per #68436

Details

The option for minBarHeight was likely removed from the discover histogram in process of migrating to Lens embeddable.

This PR adds a new minBarHeight option to the Lens embeddable args, this option is passed to all BarSeries in the DataLayer. This option optional and defaults to 1px.

Finally this value of minBarHeight is set to 2px for the unified histogram chart.

Before

After

Checklist

• Unit or functional tests were updated or added to match the most common scenarios
• If a plugin configuration key changed, check if it needs to be allowlisted in the cloud and added to the docker list

[nickofthyme]

If this feature is no longer desirable, I'm happy to close this PR.

[davismcphee]

Unified Histogram changes LGTM, thanks!

[stratoula]

@nickofthyme thanx, I think we should def do this at least for Discover. Let's not merge it until Monday that we have our weekly sync. If we decide to add it as a setting to Lens then we don't need the overrides, we will just pass it as a property to the embeddable state.

[stratoula]

We decided to add this in Lens by default, only 1px though. We can make the changes in this PR or another. @nickofthyme whatever you want!

[nickofthyme]

@stratoula Could you please take a look at these changes and lmk if I'm on the right track? The lens embeddable logic is still very strange to me. Thanks!

[stratoula]

@nickofthyme you are definitely on the right track. You need to add this both in chart_expressions and in Lens. Also does it make sense to add it as an option in the toolbar? I don't remember what we agreed tbh.

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 2b86598

Metrics [docs]

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
expressionXY	166	167	+1
lens	531	533	+2
visualizations	804	805	+1
total			+4

Async chunks

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

id	before	after	diff
expressionXY	131.4KB	132.6KB	+1.1KB
lens	1.4MB	1.4MB	+207.0B
unifiedHistogram	51.0KB	51.1KB	+15.0B
total			+1.4KB

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
expressionXY	38.7KB	38.9KB	+216.0B

Unknown metric groups

API count

id	before	after	diff
expressionXY	176	177	+1
lens	630	632	+2
visualizations	835	836	+1
total			+4

History

• 💔 Build #181426 failed 44c99d1
• 💔 Build #180771 failed 33c4d9c
• 💔 Build #180769 failed bf09bc1
• 💛 Build #167191 was flaky ba66991
• 💔 Build #167072 failed 790c7bf

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

cc @nickofthyme

[nickofthyme]

Pinging @elastic/kibana-visualizations for final review 🙏🏼

[stratoula]

Changes LGTM!