Change timeout behavior when Functions emulator running in debug mode

[samtstern]

The functions emulator enforces function timeouts but when doing breakpoint debugging the clock keeps running even when code is not executing. This is almost definitely not the desired behavior.

Original conversation

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@johngboutros that's a good feature request and I could see a few ways of achieving it:

a) Disable timeouts entirely in debug mode
b) Disable the timeout counter while a breakpoint is active
c) Other??

Would you mind filing a new issue to discuss?

Originally posted by @samtstern in #1360 (comment)

[samtstern]

@abeisgoat what do you think about this? My instinct is to go with (a) since it's simplest and the debug mode already has a different execution model so it's not a crazy leap.