The oneApi support has bit rotten since it was first introduced. Update
the support to function with the latest 2023.0.0 release and add a
check to only support that version or newer for now. Versions before
2021.2.0 have linker script failures.
Various fixes made:
* In the 2023.0.0 release, various binaries are in a llvm-bin path so
add support to search in that path. This replaces the python search
path that much older versions needed.
* newlib isn't supported with oneApi so set TOOLCHAIN_HAS_NEWLIB to
OFF to match that.
* 2023.0.0 doesn't back llvm-nm, so use binutils version. This
is expected to be fixed in 2023.1.0 release so add a check to
handle either case.
* Update compiler flag check based on clang to also support
CMAKE_C_COMPILER_ID of "IntelLLVM" as that is how the oneApi toolchain
reports itself.
Signed-off-by: Kumar Gala <kumar.gala@intel.com>
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