[llvm] [VPlan] Move predication to VPlanTransform (NFC). (PR #128420)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-nvptx64-nvidia-ubuntu` running on `as-builder-7` while building `llvm` at step 2 "checkout".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/160/builds/17815

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 2 (checkout) failure: update (failure)
...
Resolving deltas:  58% (92/157)
Resolving deltas:  59% (93/157)
Resolving deltas:  60% (95/157)
Resolving deltas:  61% (96/157)
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Resolving deltas:  64% (101/157)
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Resolving deltas:  66% (104/157)
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Resolving deltas:  70% (110/157)
Resolving deltas:  71% (112/157)
Resolving deltas:  72% (114/157)
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Resolving deltas:  75% (118/157)
Resolving deltas:  76% (120/157)
Resolving deltas:  77% (121/157)
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Resolving deltas:  80% (126/157)
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Resolving deltas:  97% (153/157)
Resolving deltas:  98% (154/157)
Resolving deltas:  99% (156/157)
Resolving deltas: 100% (157/157)
Resolving deltas: 100% (157/157), completed with 123 local objects.
>From https://github.com/llvm/llvm-project
 * branch                      main       -> FETCH_HEAD
Auto packing the repository in background for optimum performance.
See "git help gc" for manual housekeeping.
fatal: sha1 file '/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/llvm-project/.git/index.lock' write error. Out of diskspace
fatal: sha1 file '/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/llvm-project/.git/index.lock' write error. Out of diskspace

```

</details>

https://github.com/llvm/llvm-project/pull/128420