fix incorrect tooltip value in pie chart

[EmmadUsmani]

Closes #33342
Closes #32430

Description

For pie chart tooltips, we were incorrectly using the .value property of the pie chart slice. We can't use this because it is modified one case to make slices smaller than the minimum percentage setting look bigger.

    if (otherSlice.value > 0) {
      // increase "other" slice so it's barely visible
      if (otherSlice.percentage < OTHER_SLICE_MIN_PERCENTAGE) {
        otherSlice.value = total * OTHER_SLICE_MIN_PERCENTAGE;
      }
      slices.push(otherSlice);
    }

Instead, we should be using slice.displayValue, as was intended

        // Value is used to determine arc size and is modified for very small
        // other slices. We save displayValue for use in tooltips.
        value: row[metricIndex],
        displayValue: row[metricIndex],

Demo

Before	After

Checklist

• Tests have been added/updated to cover changes in this PR

[EmmadUsmani]

Current dependencies on/for this PR:

• fix incorrect tooltip value in pie chart #39180 👈
• master

This stack of pull requests is managed by Graphite.

[github-actions]

Codenotify: Notifying subscribers in CODENOTIFY files for diff d092c30...897eccd.

Notify	File(s)
@alxnddr	frontend/src/metabase/visualizations/visualizations/PieChart/utils.ts frontend/src/metabase/visualizations/visualizations/PieChart/utils.unit.spec.ts

[replay-io]

Status	Complete ↗︎
Commit	897eccd
Results	⚠️ 3 Flaky ✅ 2321 Passed

[github-actions]

@EmmadUsmani Did you forget to add a milestone to the issue for this PR? When and where should I add a milestone?