Merge branch 'master' into ds/custom_editor

* master:
  Fix scrolling in the interactive window (#10319)
  More scrollbar fixes and some CSS cleanup (#10300)
  Fix messed up regex to account for empty string form (#10307)
  Use new Mac OS VM (#10287)
  Support opening spark data frames in the data viewer (#10304)
  Disable run/interrupt/restart buttons when switching kernels (#10291)
  Merge release branch into master (#10258)
  Improve the perf of functional tests running with real jupyter (#10242)
  Reduce the number of build agents used by CI. (#10221)
  Show quickfixes for launch.json (#10245)
  Switch experiments settings scope to machine (#10237)
  Skip flaky FS test (#10244)
  Support jupyter output in the remote scenario too (#10241)
  Fix to return env variables of interpreter that is not current interpreter (#10251)
  add kernel connection sys info string (#10236)
  fix for button backgrounds (#10234)
  fixing a typo in CONTRIBUTING.md (#10044)

Author: DonJayamanne