Exec: throw error on no containers matching filter

[steiler]

Fixing #1748

[codecov]

Codecov Report

Merging #1786 (5d87f05) into main (c777995) will increase coverage by 0.01%.
Report is 1 commits behind head on main.
The diff coverage is 75.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1786      +/-   ##
==========================================
+ Coverage   51.15%   51.16%   +0.01%     
==========================================
  Files         147      147              
  Lines       14228    14230       +2     
==========================================
+ Hits         7278     7281       +3     
- Misses       6131     6132       +1     
+ Partials      819      817       -2     

Files	Coverage Δ
cmd/exec.go	73.11% <100.00%> (+0.59%)	⬆️
runtime/ignite/ignite.go	0.31% <0.00%> (ø)

... and 3 files with indirect coverage changes

[hellt]

thanks mate