Use an accurate run time when checking for topup

The top up plan uses a constant in seconds to account for rotation, time for x-ray centering etc. This is added to the total exposure time of the collection
At the moment this constant is hard coded to a random number and passed as an argument to the `check_topuup_and_wait_if_necessary` function (with a default set to 30 s).

We should figure out an accurate value for this additional time depending on what kind of collection is being run.