`RunGeometry` bounds fix (#24247)

# Objective

We sum `GlyphRun::offset` and `LineMetrics::inline_min_coord` when
calculating the run geometry bounding boxes during text layout. But this
is incorrect because `GlyphRun::offset` is set equal to `offset +
self.line.data.metrics.inline_min_coord +
self.line.data.metrics.offset`, so `inline_min_coord` is added twice.

We don't see any errors in layout because `BreakerState::set_line_x`
isn't used anywhere atm, so the value of `inline_min_coord` is always
zero, but it's still wrong.

## Solution

Don't add `inline_min_coord` to the run bounds.