[clang-tidy] Check request: suggest usage of `llvm::dyn_cast_if_present`, `llvm::cast_if_present` and `llvm::isa_and_present`

before:
```
const auto *ICE = S ? dyn_cast(S) : nullptr;
const bool IsParen = S ? isa(S) : false;
auto *Inst = Val ? cast(Val) : nullptr;
```

after:
```
const auto *ICE = dyn_cast_if_present(S);
const bool IsParen = isa_and_present(S);
auto *Inst = cast_if_present(Val);

```

The issue names clang-tidy and provides before/after examples, but no files or tests. Start by locating the clang-tidy check registry and related LLVM cast helper usage, then determine where this check belongs. Done means the check suggests the three *_if_present or isa_and_present forms for the shown conditional patterns, with tests covering the transformations.

Written by the indexing model from the issue text.