No scrollbar generated for large notebook code cell outputs

[joyceerhl]

Originally reported by @tobiasharren in microsoft/vscode-jupyter#5629

• VS Code Version: 1.56.0-insider (user setup)
• OS Version: Windows_NT x64 10.0.19042

Steps to Reproduce:

1. Create a new notebook in VS Code Insiders (doesn't have to be a Jupyter notebook).
2. Create and run a code cell that produces a lot of output. For example, in a Jupyter notebook connected to a Python kernel, run a code cell with the following code:

for i in range(50):
    print("test")

3. Cell output fills all vertical space, making it difficult to navigate the notebook. There doesn't seem to be a setting to limit the height and enable a scrollbar on the output itself.
   

Additional context: a Jupyter extension user just opted out of the native notebooks interface because there wasn't a way to limit the cell output height. Our extension supported a jupyter.enableScrollingForCellOutputs setting for our existing webview implementation of notebooks to address this user need, and users currently don't have a way to achieve the same thing in native notebooks. This is how the same code output is handled in our existing webview implementation:

Does this issue occur when all extensions are disabled?: Yes

[vscodebot]

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• Jupyter (Insider) Output Cell Scrollbar not working/showing (#118117)
• Notebooks: pasting notebook JSON into notebook should automatically add cells (#96943)
• A notebook output cell with an application/json mimetype cannot grow in width with the rest of the notebook (#119048)

[joyceerhl]

Apologies, this is a duplicate of #118117.