get_image_metadata does not handle EXIF rotation

[binomial0]

Bug Report

Environment

Zola version: 0.20.0 (installed from winget)

Expected Behavior

When processing an image that has rotation applied in the EXIF metadata, get_image_metadata() gives the correct (rotated) dimensions

Current Behavior

get_image_metadata() ignores the EXIF rotation and returns the unrotated dimensions.
This is not only undesirable for the user, but also inconsistent with resize_image which handles rotation correctly (compare #2445 that raised the equivalent issue there).

Step to reproduce

Use a JPEG image with EXIF rotation of 90 degrees, and call get_image_metadata with its path as an argument.