Merge branch '1516--memory-print-image-list' into 'release-6.4'

Resolve "PipelineMemoryPrintEstimator stops at ImageList"

See merge request orfeotoolbox/otb!9

(cherry picked from commit 51bbe2d9)

0d1911c0 BUG: Track down upstream pipeline for each image in ImageList (fix #1516)
c47e4540 COMP: Fix compilation error (prototype mismatch)
3e227125 BUG: Moving PropageRequestedRegion() at the correct place in ImageList, and…
14c23e6b BUG: Only call UpdateOutputData() if object has Source