[llvm] Revert "Reland #2 - [Offload] Introduce offload-tblgen and initial new API implementation (#108413. #117704)" (PR #117995)

[Jan Patrick Lehr via llvm-commits]

jplehr wrote:

Link to buildbot failure: https://lab.llvm.org/buildbot/#/builders/30/builds/11193

https://github.com/llvm/llvm-project/pull/117995