VK_PIPELINE_CREATE_DISABLE_OPTIMIZATION_BIT *may* cause pipeline
creation to be faster by ignoring optimizations. We can safely ignore
this flag.

Bug b/118386749

Change-Id: Icfc48fd7f54b4ccbd7ad2d5dbfcec08ce62b0f21
Tests: dEQP-VK.pipeline.early_destroy.*
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/30810
Presubmit-Ready: Alexis Hétu <sugoi@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>