Add support for poetry dependency manager

[DonJayamanne]

For #1871

• Pull request represents a single change (i.e. not fixing disparate/unrelated things in a single PR)
• Title summarizes what is changing
• Has a news entry file (remember to thank yourself!)
• Has sufficient logging.
• [n/a] Has telemetry for enhancements.
• Unit tests & system/integration tests are added/updated
• [n/a] Test plan is updated as appropriate
• [n/a] package-lock.json has been regenerated by running npm install (if dependencies have changed)
• [n/a] The wiki is updated with any design decisions/details.

[codecov]

Codecov Report

Merging #4654 into master will decrease coverage by 1%.
The diff coverage is 81%.

@@           Coverage Diff           @@
##           master   #4654    +/-   ##
=======================================
- Coverage      77%     77%   -<1%     
=======================================
  Files         445     446     +1     
  Lines       21074   21121    +47     
  Branches     3450    3455     +5     
=======================================
+ Hits        16118   16151    +33     
- Misses       4952    4966    +14     
  Partials        4       4

Flag	Coverage Δ
#Linux	65% <45%> (ø)	⬇️
#Windows	66% <45%> (ø)	⬇️
#macOS	65% <45%> (ø)	⬇️

[karrtikr]

LGTM