Adding support for running dotnet run after installing core tools thru npm

[aishwaryabh]

Issue describing the changes in this PR

resolves #2884

This image shows the previous behavior if we installed core tools through npm via running npm install -g azure-functions-core-tools@4 and running dotnet run after

Now we run the target with either bash or cmd depending on the target machine and now get the following output (tested with a local nuget package on my machine after running npm install -g azure-functions-core-tools@4)

Pull request checklist

• My changes do not require documentation changes
  • Otherwise: Documentation issue linked to PR
• My changes should not be added to the release notes for the next release
  • Otherwise: I've added my notes to release_notes.md
• My changes do not need to be backported to a previous version
  • Otherwise: Backport tracked by issue/PR #issue_or_pr
• I have added all required tests (Unit tests, E2E tests)

Additional information

Additional PR information

[liliankasem]

lgtm, but mind sharing another pkg for me to test? Can approve after I validate osx again.

[liliankasem]

validated osx - lgtm