In #4113 a user says Max clashes with a macro. Since it is only used in
a test, use std::numeric_limits::max() instead.
Note that in headers, the macro issue can be mitigated with
parenthesis like this: `(std::numeric_limits<T>::max)()`
PiperOrigin-RevId: 504284906
Change-Id: Ibf430caec1a6afdf6b303534fec6a4fd00a6373f