feat: enable multi-tenant feature toggle

[HuihuiWu-Microsoft]

ADO: https://msazure.visualstudio.com/Microsoft%20Teams%20Extensibility/_workitems/edit/30481339

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.11%. Comparing base (af47bc3) to head (7f4b392).
Report is 3 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev   #12910   +/-   ##
=======================================
  Coverage   90.10%   90.11%           
=======================================
  Files         578      578           
  Lines       34541    34542    +1     
  Branches     6768     6708   -60     
=======================================
+ Hits        31123    31127    +4     
  Misses       1505     1505           
+ Partials     1913     1910    -3     

Files with missing lines	Coverage Δ
...kages/cli/src/commands/models/accountLoginAzure.ts	94.44% <100.00%> (+4.44%)	⬆️
...ckages/cli/src/commands/models/accountLoginM365.ts	100.00% <ø> (+8.33%)	⬆️
packages/cli/src/commands/models/accountShow.ts	97.64% <100.00%> (-0.06%)	⬇️
packages/fx-core/src/common/featureFlags.ts	96.66% <ø> (-0.11%)	⬇️
...ackages/fx-core/src/component/m365/launchHelper.ts	85.71% <100.00%> (-0.37%)	⬇️
...vscode-extension/src/treeview/account/azureNode.ts	92.15% <100.00%> (-0.30%)	⬇️
.../vscode-extension/src/treeview/account/m365Node.ts	88.88% <100.00%> (+1.08%)	⬆️