chore: Update geo trace fitbounds default to 'locations'

[camdecoster]

Description

Updates the fitbounds default value to "locations" for geo traces. Also fixes (previously unknown) bug related to using zoom buttons with fitbounds active.

Closes #7855

Changes

• Changes default
• Update schema and types
• Persists view attributes to layout
• Updates tests per above changes

Videos

Before (fitbounds: false, default)

Screencast.From.2026-07-09.15-30-04.mp4

Before (fitbounds: "locations")

Screencast.From.2026-07-09.16-51-23.mp4

After (fitbounds: "locations", default)

Screencast.From.2026-07-09.15-29-05.mp4

Testing

• Be on master
• Load Plotly devtools
• Open the mock geo_orthographic
• Note that the plot is centered on the US/Canada
• Switch to this branch
• Open the same mock
• Note that the plot is now centered on Asia

Notes

• fitbounds used to default to false. This changes the default to "locations".
• Any plot that wants to maintain the current view calculation will need to pass false to fitbounds
• This update matches the convention that most mapping libraries use
• The bug (fixed in this PR) meant that zoom button clicks had no effect on the view when fitbounds was active