[llvm] [openmp] [OMPT][Offload][OpenMP] Fixes for OMPT data used by libomptarget (PR #156020)

[Jan Patrick Lehr via llvm-commits]

jplehr wrote:

Thank you for the PR.

Can we potentially separate out the changes that only refactor the tests with strings instead of integers so that it is easier to see which parts do functionality?
We can land those first as an NFC patch.

https://github.com/llvm/llvm-project/pull/156020