[SYCL] Remove unnecessary fallback-cassert file for CUDA/AMD assert

[jinge90]

We have removed fallback device library jit-link path, so there is no need to have separate libsycl-fallback-* library files. The only exception is imf libraries for SPIRV targets.
This PR is a series of patches to clean up all unnecessary libsycl-fallback-* library files exposing _devicelib* APIs, we clean up libsycl-fallback-cassert for CUDA/AMD target.
For Intel Target, the __devicelib_assert_fail is provided by IGC or OpenCL CPU runtime and for AMD/CUDA target, underlying runtime provides similar function '__assertfail'.

[jinge90]

Hi, @intel/llvm-gatekeepers
These is an unexpected pass in pre-ci:
Unexpectedly Passed Tests (1):
SYCL :: Matrix/joint_matrix_bf16_fill_k_cache_SLM.cpp
Is it a known issue?
Thanks very much.

[steffenlarsen]

I can't see this affecting Intel Arc testing, so my assumption is that it's either sporadic or that there has been some environment changes that causes this to now pass. I will merge it, then we can revert if my assumptions are wrong.

Tag @dkhaldi