[CLI] Fix registry decorator return value

[carmocca]

What does this PR do?

Part of #7250

Does your PR introduce any breaking changes? If yes, please list them.

None

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[codecov]

Codecov Report

Merging #9587 (acd5197) into master (856ed10) will decrease coverage by 0%.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master   #9587   +/-   ##
======================================
- Coverage      93%     93%   -0%     
======================================
  Files         181     181           
  Lines       15295   15350   +55     
======================================
+ Hits        14211   14247   +36     
- Misses       1084    1103   +19     

[tchaton]

LGTM !