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

[denzor200]

before:

const auto *ICE = S ? dyn_cast<ImplicitCastExpr>(S) : nullptr;
const bool IsParen = S ? isa<ParenExpr>(S) : false;
auto *Inst = Val ? cast<Instruction>(Val)  : nullptr;

after:

const auto *ICE = dyn_cast_if_present<ImplicitCastExpr>(S);
const bool IsParen = isa_and_present<ParenExpr>(S);
auto *Inst = cast_if_present<Instruction>(Val);

[llvmbot]

@llvm/issue-subscribers-clang-tidy

Author: Denis Mikhailov (denzor200)

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

after:

const auto *ICE = dyn_cast_if_present<ImplicitCastExpr>(S);
const bool IsParen = isa_and_present<ParenExpr>(S);
auto *Inst = cast_if_present<Instruction>(Val);