Before finalization, the IR is not verifiable.
This should also be finalized before optimization passes.

Bug: b/131914569
Change-Id: Ibc5b2bf85369412148565daaf81779dac30d6e8a
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/30452Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Ben Clayton <bclayton@google.com>