[llvm] [flang-rt] Add support for logical binary input edit descriptor (PR #193490)

[Eugene Epshteyn via llvm-commits]

eugeneepshteyn wrote:

@jotken , could you please add a unit test? Look in llvm-project/flang-rt/unittests/Runtime/ to see if there are unit tests for other descriptors to model after.

https://github.com/llvm/llvm-project/pull/193490