adapt completions for clab alias

[hellt]

fix #2358

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.88%. Comparing base (38ea59a) to head (de263b8).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2388      +/-   ##
==========================================
+ Coverage   51.85%   51.88%   +0.03%     
==========================================
  Files         172      172              
  Lines       17302    17302              
==========================================
+ Hits         8972     8978       +6     
+ Misses       7386     7381       -5     
+ Partials      944      943       -1     

Files with missing lines	Coverage Δ
cmd/root.go	72.72% <ø> (ø)

... and 1 file with indirect coverage changes