[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 `clang-aarch64-sve2-vla` running on `linaro-g4-02` while building `llvm` at step 14 "test-suite".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/198/builds/4652

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

```
Step 14 (test-suite) failure: test (failure)
...
size..init_array: 16 
size..interp: 27 
size..note.ABI-tag: 32 
size..plt: 928 
size..rela.dyn: 1176 
size..rela.plt: 1344 
size..rodata: 14491 
size..text: 198032 
**********
NOEXE: test-suite :: Fortran/gfortran/regression/gfortran-regression-execute-regression__inline_sum_3_f90.test (6089 of 10355)
******************** TEST 'test-suite :: Fortran/gfortran/regression/gfortran-regression-execute-regression__inline_sum_3_f90.test' FAILED ********************
Executable '/home/tcwg-buildbot/worker/clang-aarch64-sve2-vla/test/sandbox/build/Fortran/gfortran/regression/gfortran-regression-execute-regression__inline_sum_3_f90' is missing
********************
PASS: test-suite :: Fortran/gfortran/regression/gfortran-regression-execute-regression__implicit_12_f90.test (6090 of 10355)
********** TEST 'test-suite :: Fortran/gfortran/regression/gfortran-regression-execute-regression__implicit_12_f90.test' RESULTS **********
compile_time: 0.8763 
exec_time: 0.0005 
hash: "ac6b5721de1683371acd2a9be1d52f6f" 
link_time: 0.0000 
size: 565496 
size..bss: 176 
size..comment: 256 
size..data: 232 
size..data.rel.ro: 176 
size..dynamic: 496 
size..dynstr: 630 
size..dynsym: 1608 
size..eh_frame: 20608 
size..eh_frame_hdr: 5740 
size..fini: 20 
size..fini_array: 8 
size..gnu.hash: 28 
size..gnu.version: 134 
size..gnu.version_r: 96 
size..got: 160 
size..got.plt: 480 
size..init: 24 
size..init_array: 16 
size..interp: 27 
size..note.ABI-tag: 32 
size..plt: 944 
size..rela.dyn: 1248 
size..rela.plt: 1368 
size..rodata: 16035 
size..text: 353904 
**********
PASS: test-suite :: Fortran/gfortran/regression/gfortran-regression-execute-regression__implicit_class_1_f90.test (6091 of 10355)
********** TEST 'test-suite :: Fortran/gfortran/regression/gfortran-regression-execute-regression__implicit_class_1_f90.test' RESULTS **********
compile_time: 0.8763 

```

</details>

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