[2.x] upgrade plotly to v2 (#1432)

[joshuali925]

Description

[Describe what this change achieves]

Issues Resolved

[List any issues this PR will resolve]

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8b7966b) 56.85% compared to head (24d4b78) 56.85%.

Additional details and impacted files

@@           Coverage Diff           @@
##              2.x    #1448   +/-   ##
=======================================
  Coverage   56.85%   56.85%           
=======================================
  Files         318      318           
  Lines       11524    11524           
  Branches     3005     3005           
=======================================
  Hits         6552     6552           
  Misses       4920     4920           
  Partials       52       52           

Flag	Coverage Δ
dashboards-observability	56.85% <ø> (ø)

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