Move utils from src/utils into src/client/common/utils

[DonJayamanne]

All extension files are under src/client.
If we're going to change this it must be done in a consistent manner (i.e. remove client folder completely. However, we then end up with a tonne of folders sitting beside the test directory. Generally this isn't how JS/TS projects are structured).

We have client and server as that' what VSC requires, this may have been fixed since then.

[ericsnowcurrently]

Thanks for taking care of this and for the explanation. This was my fault. You were out so Derek and I talked about it and the change made sense at the time. :) The premise was that src/utils was common to both src/client and src/server. However, it sounds like src/client is the only one that matters, so moving the directory there sounds good. Thanks again.