test: IW execution hint

[amunger]

Refs: #213858

• macOS @deepak1556
• windows @bamurtaugh

Complexity: 3

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Description

The default keybinding for executing the input of the interactive window has been switched from shift+enter to just enter to match up better with typical REPL behavior. To minimize the impact of this behavior, we have increased the visibility of the execution hint in the input box and also added a button to quickly configure that setting.

• The gear icon toolbar is planned to be a temporary addition for this migration.
• A setting is ideal for configuring this behavior since both python and core contribute a keybinding, and both respect this setting

Pre-requisites - If you don't have python set up to run notebooks

1. Install both jupyter and python pre-release extensions
2. ensure python is installed on your machine
3. open a workspace where you will be running tests for this TPI
4. Create: new jupyter notebook and run print(1) in a cell.
   a. If the cell runs successfully, you're already set up, otherwise...
5. The kernel picker should open, select "Python Environments..." -> "Create Python Environment..." -> select venv or conda, and whichever version you'd like.

A virtual environment should get created in your workspace with all necessary packages installed, and the cell should run successfully.

Test steps

1. run the command Jupyter: Create Interactive Window
2. note the execution hint in the input box, and use the stated keyboard shortcut to execute a command, e.g. print(1)
3. when the input is empty, click the gear to open the related settings, and swap the setting to change the keybinding
4. ensure that the hint is updated and that the new keyboard shortcut works to execute