[CUDA] Print a warning when loading the CUPTI library fails

[pasaulais]

https://github.com/oneapi-src/unified-runtime/pull/1070 is adding support for running tracing-enabled builds of the CUDA adapter on systems where the CUPTI library cannot be found at runtime. No feedback is given when the library cannot be loaded however, which might be confusing to users. A run-time warning should be printed when loading the library fails.