`performance-move-const-arg` not detected with ternary

[firewave]

#include <string>

void func(const std::string&);

void f(bool b)
{
    std::string s;
    func(b ? "" : std::move(s));
}

https://godbolt.org/z/q8Phdzfea

[llvmbot]

@llvm/issue-subscribers-clang-tidy

Author: Oliver Stöneberg (firewave)

```cpp #include <string>

void func(const std::string&);

void f(bool b)
{
std::string s;
func(b ? "" : std::move(s));
}

https://godbolt.org/z/q8Phdzfea
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