The models delete calls as call to the operator delete in the IR

Notes:

• Arguments other than the pointer are ignored (the call will just have 1 arg for the call even if it needs 2-4).
• No handling of the destructor.
• No side affect is added like we have for `new
• No checking for null (kind-of OK, it's unspecified whether the deallocator is called for null, clang and gcc check for null but msvc passes it along)

The new test results are all true positives.

MRVA finds some FPs though