[Clang] Link ITT libraries in device code by default

[uditagarwal97]

Fixes: CMPLRLLVM-63157

Problem
Consider the following case:

clang++ -fsycl -c testFile.cpp -o obj1.o
clang++ -fsycl -c testFile2.cpp -o obj2.o -fsycl-instrument-device-code
clang++ -fsycl obj1.o obj2.o -o test.exe

// test.exe fails with:
JIT session error: Symbols not found: [ __itt_offload_wi_finish_wrapper, __itt_offload_wi_start_wrapper ]

This issue was observed while using MKL static libraries built with -fsycl-instrument-device-code with the latest compiler that does not link ITT annotations by default.

With this change, we link in ITT libraries by default to stays ABI compliant with the previous release. During device code linking, if the device code is not instrumented with ITT annotations, this library will be omitted. Note that, even with this change, we are not instrumenting device code with ITT annotations by default.

[uditagarwal97]

@jbrodman FYI.