Add usage_type 'scan' to getAggregates commands for tasks

[sarahd93]

Checklist:

• [N/A] Tests
• CHANGELOG Entry

[codecov]

Codecov Report

Merging #1906 into gsa-9.0 will increase coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           gsa-9.0    #1906      +/-   ##
===========================================
+ Coverage    48.97%   48.98%   +0.01%     
===========================================
  Files         1067     1067              
  Lines        24943    24943              
  Branches      7018     7044      +26     
===========================================
+ Hits         12215    12218       +3     
+ Misses       11567    11564       -3     
  Partials      1161     1161

Impacted Files	Coverage Δ
gsa/src/gmp/commands/tasks.js	36% <ø> (ø)	⬆️
gsa/src/web/entities/container.js	45.99% <0%> (+1.26%)	⬆️

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