feat(Icon): add qna outline variant

[lawrencecushman]

Adding the outlined version of the QnA icon from Teams

before

after

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@23b34a9). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1546   +/-   ##
=========================================
  Coverage          ?   71.82%           
=========================================
  Files             ?      829           
  Lines             ?     6697           
  Branches          ?     1917           
=========================================
  Hits              ?     4810           
  Misses            ?     1882           
  Partials          ?        5

Impacted Files	Coverage Δ
...s/components/Icon/svg/ProcessedIcons/icons-qna.tsx	100% <ø> (ø)
...src/themes/teams/components/Icon/svg/icons/qna.tsx	100% <ø> (ø)

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