[llvm] [ValueTracking] Handle and/or of conditions in `computeKnownFPClassFromContext` (PR #118257)

[via llvm-commits]

asmok-g wrote:

Heads-up: [this function](https://github.com/tensorflow/tensorflow/blob/master/tensorflow/core/framework/tensor_util.cc#L292) changes behavior when optimized after this commit. Precisely when optimized + using msan on k8.

https://github.com/llvm/llvm-project/pull/118257