fix: add markDef.tooltip for interactive check

[ChiaLingWeng]

close #9190

For the original fail case, I found that adding tooltip in the encoding field can solve the issue.
My assumption is the interactiveFlag missed to check markDef.tooltip field, and thus add it in this PR

"encoding": {
        "x": {
          "field": "date",
          "type": "temporal",
          "scale": {"domain": {"param": "brush"}},
          "axis": {"title": ""}
        },
        "y": {"field": "price", "type": "quantitative"},
        "tooltip": [
          {"field": "price", "type": "quantitative"},
          {"field": "date", "type": "temporal"}
        ]
      }

vega-lite/src/compile/mark/mark.ts

Lines 377 to 381 in ffec017

	return parentCount
	? {
	interactive: unitCount > 0 || model.mark === 'geoshape' || !!model.encoding.tooltip
	}
	: null;

[domoritz]

Thank you (for this and the other PRs). You could ask to become a maintainer if you'd like. https://github.com/vega/.github?tab=readme-ov-file#adding-maintainers