Polyglot Notebook: [DevExE2E] When saving the newly created .dib/ipynb file, the cell execution results will be disappeared and these files still in unsaved status.

[v-hozha1]

Describe the bug When saving the newly created .dib/ipynb file, the cell execution results will be disappeared and these files still in unsaved status. If we want to close them, it will reminder us "Do you want to save the changes you made to..."

Detailed Repro Build info: VSCodeSetup-x64-1.90.0 + dotnet-interactive-vscode-1.0.5312031.vsix + dotnet-sdk-8.0.302-win-x64

VS Code link: https://code.visualstudio.com/download# Version: 1.90.0 (system setup) Commit: 89de5a8d4d6205e5b11647eb6a74844ca23d2573 Date: 2024-06-04T19:33:54.889Z Electron: 29.4.0 ElectronBuildId: 9593362 Chromium: 122.0.6261.156 Node.js: 20.9.0 V8: 12.2.281.27-electron.0 OS: Windows_NT x64 10.0.19045

dotnet-interactive-vscode-1.0.5312031.vsix https://dev.azure.com/dnceng/internal/_build/results?buildId=2472419&view=artifacts&pathAsName=false&type=publishedArtifacts

Steps: 1.Ctrl+Shift+P` => "Polyglot Notebook: Create new blank notebook" 2.Select "Create as .ipynb" 3.Select "F#" 4.Set the cell contents to 1+1 and execute. 5.Save the file to disk 6. Check the files status in VSCode page.

Expected Results: The files should be saved in disk normally and the execution results should still shown in VSCode page.

Actual Results: When saving the newly created .dib/ipynb file, the cell execution results will be disappeared and these files still in unsaved status. If we want to close them, it will reminder us "Do you want to save the changes you made to..."

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[pkese]

I think that the .dib files are not supposed to store cell outputs anyway.
See: https://accessibleai.dev/post/polyglot_dib_vs_ipynb/

.ipynb files however should store outputs, but apparently there's a bug that the contents of the files disappear after opening. See #3335

[jonsequitur]

Related: #3544.

[v-hozha1]

This issue still reproduces on VSCode\1.97.2+ vsix\dotnet-interactive-vscode-1.0.6120031.vsix.