Use default thread sanitizer linkage (#833)

Use default thread sanitizer linkage (#833)

GCC and CLang *default* sanitizer linkage differs (static vs. dynamic).
Prefer default behavior as alternate seen having issues.

Default (GN)U linker fails with unresolved symbols linking Clang built
binaries with sanitizer enabled. Force use LLVM linker lld for Clang
builds.

Sanitizer instrumentation and link flags should be retained for all
binaries. Updating samples cmake configuration to keep those flags
after unset logic at the ie_build_samples().