Kql created Dataframe variables undefined in Pylance

[bschnurr]

Maybe need to fake declarations for kernel variables before sending code to pylance.

Environment data

• VS Code version: XXX
• Jupyter Extension version (available under the Extensions sidebar): XXX
• Python Extension version (available under the Extensions sidebar): XXX
• OS (Windows | Mac | Linux distro) and version: XXX
• Python and/or Anaconda version: XXX
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): XXX
• Jupyter server running: Local | Remote | N/A

Expected behaviour

completions variable seen in Jupyter:variables table shouldn't be undefined

Actual behaviour

completions variable of type Dataframe undefined

Steps to reproduce:

[NOTE: Self-contained, minimal reproducing code samples are extremely helpful and will expedite addressing your issue]

1. XXX

Logs

Output for Jupyter in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Jupyter)

XXX

[rchiodo]

This is very simlar to #6987. Closing as a dupe of that.