[clang] [Clang][OpenMP][LoopTransformations] Fix incorrect number of generated loops for Tile and Reverse directives (PR #140532)

[Walter J.T.V via cfe-commits]

eZWALT wrote:

Before leaving i can attest that the regression tests have been passed twice :+1: 

https://github.com/llvm/llvm-project/pull/140532