[NFC][Driver] Refactor SYCLTargetInfoList init.

[bader]

Changed the logic from

if ( not NVPTX and not AMDGCN) {
  if (Intel) {
    // process Intel case
    continue;
  }
  // process targets which are not Intel, NVPTX or AMDGCN
} else {
  // process NVPTX and AMDGCN case
}

to more readable (in my opinion)

if (NVPTX or AMDGCN) {
  // process NVPTX and AMDGCN case
} else if (Intel) {
  // process Intel case
} else {
  // process targets which are not Intel, NVPTX or AMDGCN
}

Inside NVPTX and AMDGCN branch replaced

auto it = find_if(...);
if (it == end)
  ...

to

if (none_of(...))
  ...

[bader]

Hit Reduction/reduction_big_data.cpp failure from #15003 again. @cperkinsintel, FYI.