Use functor filter in app image utils

Summary

Replaces the UnaryImageFunctor by the new FunctorFilter framework, in otbConvert (deprecated) and otbDynamicConvert.

Rationale

Use the Functor Filter framework (see !299 (merged))

Implementation Details

Additional notes

Copyright

The copyright owner is CNES and has signed the ORFEO ToolBox Contributor License Agreement.

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Check before merging:

• All discussions are resolved
• At least 2 votes from core developers, no vote.
• The feature branch is (reasonably) up-to-date with the base branch
• Dashboard is green
• Copyright owner has signed the ORFEO ToolBox Contributor License Agreement

changed the description

Convert app was removed in !324 (merged), so this MR needs to only update the DynamicConvert part.

added 64 commits

• 49964234...a0fa5e29 - 63 commits from branch develop
• d6a9b0d3 - Merge branch 'develop' into use_Functor_Filter_in_AppImageUtils

Compare with previous version

Synced with develop and resolved merge conflict.

This can be merged I think ?

added refactoring label

merged

mentioned in commit cfefa67f

changed milestone to %7.0.0