cleanup: Remove fault_tolerance header and macros

[johnbowen42]

Rich and I discussed removing RAJA fault_tolerance header and macros offline, this PR is following up on that

[rhornung67]

@johnbowen42 the FT macros are used in more files. I assume this is a WIP and you will be removing all use of the macros, correct?

Specifically, they appear in other files matching this pattern policy/*/{forall,launch}.hpp.

Also, there are CMake references in include/RAJA/config.hpp.inand in files in the RAJA/cmake directory.

[johnbowen42]

@johnbowen42 the FT macros are used in more files. I assume this is a WIP and you will be removing all use of the macros, correct?

Specifically, they appear in other files matching this pattern policy/*/{forall,launch}.hpp.

Also, there are CMake references in include/RAJA/config.hpp.inand in files in the RAJA/cmake directory.

Yes, they should be gone now. I also removed some iterator fault tolerance methods, but let me know if I should keep those in

[adayton1]

I think ubsan has checks for integer overflow, though I don't know if that is host code only.

[rhornung67]

Please put everything related to RAJA_ENABLE_ITERATOR_OVERFLOW_DEBUG macro constant back in the code in this PR. We can remove it later if we discuss it and decide it's not needed anymore.

[rhornung67]

Thank you @johnbowen42 We can decide on the iterator stuff after the new year.