After #33577, `get_outer_sizes_from_style()` is only used for column and
cell measures. For these it's expected to ignore sizing keywords like
`min-content`, so rename the function to `get_outer_sizes_for_measurement()`.
Additionally, both callers need the percentage contribution, so include
it in the returned tuple.
Signed-off-by: Oriol Brufau <obrufau@igalia.com>