fix VSCode can not use microphone and camera on MacOS 10.15

[weishuyin]

This PR fixes #
Start VSCode by click it's icon(DO NOT start VSCode via Terminal.app, DO NOT use code -n or other code command) on MacOS 10.15, than exec some command which use microphone, for example 'sox -d ~/test.wav'(may need to exec 'brew install sox' first) in VSCode's TERMINAL.
There is no dialog shown to request microphone permission. Command sox record nothing in output file and no errors reported, and VSCode is not on Settings → Privacy → Microphone list

With this patch, when we exec sox first time, there is a dialog shown to request microphone permission. Command sox can record, and VSCode will be on Settings → Privacy → Microphone list.

[deepak1556]

Thanks for the PR! but I am not really happy adding the media entitlements to VS Code since it is not necessary at the moment. The way the integrated terminal is spawned today is as forked process of code's renderer process and hence get the permissions assigned to the parent process, I would like to see if the process spawning can be fixed otherwise we can go down the entitlement road.

This is tracked under #95062