[llvm] [TableGen] Use PrintFatalError in ParseTreePattern for proper error handling of llvm-tblgen (PR #161417)

[Prerona Chaudhuri via llvm-commits]

pchaudhuri-nv wrote:

Requesting @arsenm , @jurahul to help review.

I am very new to this process, so a very small question, in the github pipeline windows and linux build is required, how do I complete that ? I have locally verified on linux that the lit tests are passing.

https://github.com/llvm/llvm-project/pull/161417