Fix missing method import "find_bug_number"

[okurz]

Related progress issue: https://progress.opensuse.org/issues/65283

[kraih]

There would have to be a serious hole in our test coverage for this to happen.

[okurz]

yes, @kalikiana will look into the missing coverage

[kalikiana]

Aye, I'll plug the hole in our coverage. In the meantime the fix looks good. Thanks @okurz

[codecov]

Codecov Report

Merging #2906 into master will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2906      +/-   ##
==========================================
- Coverage   93.34%   93.34%   -0.01%     
==========================================
  Files         189      189              
  Lines       11931    11928       -3     
==========================================
- Hits        11137    11134       -3     
  Misses        794      794              

Impacted Files	Coverage Δ
lib/OpenQA/Schema/Result/Needles.pm	96.42% <100.00%> (ø)
lib/OpenQA/WebAPI/Controller/File.pm	96.15% <100.00%> (-0.04%)	⬇️
lib/OpenQA/WebAPI/Controller/Step.pm	92.43% <100.00%> (-0.06%)	⬇️

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