Python REPL conflicts with Jupyter IW

[rebornix]

Re #23484

Steps:

• Install both Jupyter and Python extensions
• Create a python file with following

# %%

def foo():
    print(1)

foo()

• Enable python.REPL.sendToNativeREPL
• From Context Menu, Run Python -> Run Selection/Line in Python REPL
• An editor named "Python REPL" created
• From Context Menu, Run in Interactive Window -> Run Current Cell
• A second editor named "Python REPL" created 🐛 (not sure why it's called Python REPL)
• From Context Menu, Run Python -> Run Selection/Line in Python REPL
• A third editor was created, other than reusing the first one

[anthonykim1]

Just put up the PR for this after getting advice from @amunger regarding switching to use workspace.onDidCloseNotebookDocument other than using window.onDidChangeVisibleTextEditors.
PR reference: #23530
This seem to also resolve the problem where Python REPL was overwriting to the Jupyter's IW title??