The fuzzing harnesses from #19143 don't compile on macOS. i.e building at 476436b2dec254bb988f8c7a6cbec1d7bb7cecfd:
```bash
In file included from test/fuzz/addition_overflow.cpp:7:
./test/fuzz/util.h:335:13: error: no matching function for call to 'AdditionOverflow'
        if (AdditionOverflow((uint64_t)fuzzed_file->m_offset, random_bytes.size())) {
            ^~~~~~~~~~~~~~~~
./test/fuzz/util.h:201:16: note: candidate template ignored: deduced conflicting types for parameter 'T' ('unsigned long long' vs. 'unsigned long')
NODISCARD bool AdditionOverflow(const T i, const T j) noexcept
               ^
./test/fuzz/util.h:346:13: error: no matching function for call to 'AdditionOverflow'
        if (AdditionOverflow(fuzzed_file->m_offset, n)) {
            ^~~~~~~~~~~~~~~~
./test/fuzz/util.h:201:16: note: candidate template ignored: deduced conflicting types for parameter 'T' ('long long' vs. 'long')
NODISCARD bool AdditionOverflow(const T i, const T j) noexcept
               ^
2 errors generated.

In file included from test/fuzz/buffered_file.cpp:9:
./test/fuzz/util.h:335:13: error: no matching function for call to 'AdditionOverflow'
        if (AdditionOverflow((uint64_t)fuzzed_file->m_offset, random_bytes.size())) {
            ^~~~~~~~~~~~~~~~
./test/fuzz/util.h:201:16: note: candidate template ignored: deduced conflicting types for parameter 'T' ('unsigned long long' vs. 'unsigned long')
NODISCARD bool AdditionOverflow(const T i, const T j) noexcept
               ^
./test/fuzz/util.h:346:13: error: no matching function for call to 'AdditionOverflow'
        if (AdditionOverflow(fuzzed_file->m_offset, n)) {
            ^~~~~~~~~~~~~~~~
./test/fuzz/util.h:201:16: note: candidate template ignored: deduced conflicting types for parameter 'T' ('long long' vs. 'long')
NODISCARD bool AdditionOverflow(const T i, const T j) noexcept
               ^
2 errors generated.
```
tx_destination = witness_unknown;
        break;
    }
    }
    return tx_destination;
}
template <typename T>
NODISCARD bool MultiplicationOverflow(const T i, const T j) noexcept
{
    static_assert(std::is_integral<T>::value, "Integral required.");
    if (std::numeric_limits<T>::is_signed) {
        if (i > 0) {
            if (j > 0) {
                return i > (std::numeric_limits<T>::max() / j);
            } else {
                return j < (std::numeric_limits<T>::min() / i);
            }
        } else {
            if (j > 0) {
                return i < (std::numeric_limits<T>::min() / j);
            } else {
                return i != 0 && (j < (std::numeric_limits<T>::max() / i));
            }
        }
    } else {
        return j != 0 && i > std::numeric_limits<T>::max() / j;
    }
}
template <class T>
NODISCARD bool AdditionOverflow(const T i, const T j) noexcept