Adjust task icons to work for audits and remove audit icons

[sarahd93]

Remove audit icons and use task icons for both tasks and audits. This will reduce unnecessary duplicate code and fix problems with the audit icon tooltips.

Checklist:

• Tests
• CHANGELOG Entry

[codecov]

Codecov Report

Merging #2070 into master will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2070      +/-   ##
==========================================
- Coverage   52.26%   52.23%   -0.03%     
==========================================
  Files        1068     1066       -2     
  Lines       25528    25516      -12     
  Branches     7220     7244      +24     
==========================================
- Hits        13341    13329      -12     
  Misses      11066    11066              
  Partials     1121     1121              

Impacted Files	Coverage Δ
gsa/src/web/pages/audits/actions.js	100.00% <100.00%> (ø)
gsa/src/web/pages/audits/detailspage.js	100.00% <100.00%> (ø)
gsa/src/web/pages/tasks/icons/resumeicon.js	100.00% <100.00%> (ø)
gsa/src/web/pages/tasks/icons/starticon.js	100.00% <100.00%> (ø)
gsa/src/web/pages/tasks/icons/stopicon.js	100.00% <100.00%> (ø)

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