This PR moves the `create_image_bitmap` method from `GlobalScope` to a
helper function within the `ImageBitmap` implementation in
`imagebitmap.rs`.
Moving this method improves code organization and maintainability. Given
that `globalscope.rs` is already quite large, relocating
`create_image_bitmap` to `imagebitmap.rs` places it closer to the
`ImageBitmap` struct it primarily operates on.
As mentioned in the issue description (No dedicated tests are required
for this change, as long as the project builds), which it does using
`./mach build`. Also ran `./mach fmt` and `./mach test-tidy` which both
didn't report any issue.
Closes#37348
Signed-off-by: Bhuwan Pandit <bhuwanpandit109@gmail.com>
d7269c0f3b