Use bulk Rich PD cluster global positions method

Make use of the new more efficient bulk conversion method defined in the interface update in LHCb!1330 (merged) and implemented in Lbcom!248 (merged)

Note, due to changes in the way the pixel positions are calculated, moving those calculations from scalar to SIMD implementations, the resulting positions are not bit-wise identical to before and thus small diffs in the logs are expected. Also note, a number of algorithms have been removed from the pixel processing sequence, as the calls to compute the global and local space points for each cluster are now incorporated into the SIMD pixel summary algorithm, for improved efficiency reasons.