sunburst errors with "Non-leaves are not permitted in the dataframe"

The logic to check for non-leaves is dubious, e.g. a leaf whose name is a suffix of another leaf triggers an error.
The check also depends on the alphabetical ordering on the leaves.

As suggested by #3589, I wonder whether this non-leaf detection is really meaningful.
I'd be happy to write a PR to remove this check. Thoughts?

minimal working example

import pandas as pd
import plotly.express as px

df = pd.DataFrame(
    {
        "status": ["NOT_YET_COMPLETED", "COMPLETED"],
        "next_step": ["Wrapup", None],
        "count": [1, 2],
    }
)
# no error
px.sunburst(df, path=["status", "next_step"], values="count")

df.loc[0, "status"] = "ACTIVE_NOT_YET_COMPLETED"
# error (spurious)
px.sunburst(df, path=["status", "next_step"], values="count")

Beginne damit, das minimale pandas- und px.sunburst-Beispiel im Issue auszuführen, und verfolge dann die sunburst-Pfadvalidierung, die den non-leaf-Fehler erzeugt. Erledigt ist die Aufgabe, wenn der Fall eines suffixbenannten Leafs keinen fälschlichen Fehler mehr auslöst und das bestehende non-leaf-Verhalten weiterhin durch Tests abgedeckt ist.