Revert "[VPlan] Use VPInstructionWithType for uniform casts." (#202427) Reverts llvm/llvm-project#140623 breaks https://lab.llvm.org/buildbot/#/builders/160/builds/39088 due to visibility issues GitOrigin-RevId: 5eae7dc2ac7d8dde06a943771b792aeb91c31f57