chore(CTestDriver): skip project building according to cmake.buildBeforeRun config

[Dabsunter]

This change addresses item #3919

This changes auto-build behavior when launching/debugging tests from the test explorer view.

The following changes are proposed in the CTest driver:

• Skip project building if cmake.buildBeforeRun is set to false (true by default, meaning the default installation will keep the current behavior)

The purpose of this change

Sometime during debugging sessions, we might want to run/debug tests multiple time without any code change, and those unnecessary re-build steps can be very time consuming in big projects.

Having the auto-build feature on by default is fine, but we should be able to disable it.

Other Notes/Information

I relied on the already existing cmake.buildBeforeRun config, but we could introduce a dedicated cmake.ctest.buildBeforeTest to give the user more granularity in their choice...

[gcampbell-msft]

I agree with your assessment that it could also be useful to have a more granular test setting for this, but I think that for now, this should work, we can always make it more granular later.

Approved.