Enable controlling shell expansion via "argsCanBeInterpretedByShell"

[roblourens]

We now have the ability to let the user decide whether arguments passed to a debuggee in a terminal should be escaped for the shell. This is adopted in js-debug, microsoft/vscode-js-debug#1335, also see microsoft/vscode#149910, would love to see it adopted for python in August. In js-debug, the args property can be a string or an array of strings. If it's just a string, the args are not escaped. I can talk more about what it will take to adopt this if needed.

[int19h]

Unless there are any specific reasons to not do so, I think we should follow the pattern established by JS, so that configs are consistent across languages as much as possible. Implementing this in debugpy should be straightforward.

[roblourens]

Thanks for getting to this so quickly!