[llvm] [llvm-readobj][COFF] Implement --coff-pseudoreloc in llvm-readobj to dump runtime pseudo-relocation records (PR #151816)

[Tomohiro Kashiwada via llvm-commits]

kikairoya wrote:

While investigating #149639, we used the script previously created by @mstorsjo and @jeremyd2019 for dumping pseudo‑relocs.  
So the tool has already been used at least twice — I bet a third time will come too.

https://github.com/llvm/llvm-project/pull/151816