[llvm] [TableGen] Add support for emitting new function definition to return a range of results for Primary Key (PR #96174)

[Garvit Gupta via llvm-commits]

quic-garvgupt wrote:

I am not able to install the dependencies needed to build the documentation locally. I will really appreciate if someone else can build the documentation and verify if the changes in `BackEnds.rst` file are fine. Thanks

https://github.com/llvm/llvm-project/pull/96174