[XLA:CPU] Remove uses of deprecated CreateAlignedLoad/Store builders

These are being removed in https://github.com/llvm/llvm-project/commit/f515ca8995ce3695c6e92d83ffca2012dc753bb3

Upstreaming original change made by Alexander Kornienko (alexfh@google.com)

Bug: none
Change-Id: I1b1553308cc40c7e99508fb5e3999e16049a8884
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/52868
Presubmit-Ready: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Tested-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>