math_brute_force: Refactor input generation & reduce default test size

[rjodinchr]

This patch consolidates the hardcoded arrays of edge-case test values
from multiple individual test files into a single, shared location.

[rjodinchr]

Depends on #2706

[joselopeqti]

Hi @rjodinchr, would it be possible to rebase to main?

[rjodinchr]

ref #2723

[ahesham-arm]

LGTM. Generally do we need these to be std::vector or is std::array a better fit here?

[rjodinchr]

LGTM. Generally do we need these to be std::vector or is std::array a better fit here?

Even though C++17 allows for variable initialization without specifying the size, function prototypes still require it.
This means get*SpecialValues must explicitly expose the element count, creating a maintenance burden whenever elements are added or removed, despite providing little to no performance benefit.

[ahesham-arm]

Makes sense, thanks for checking.

[rjodinchr]

@bashbaug @kpet, is this fine to merge right now, as this is a non-functional change with an approval?
It would allow me to push the next one for math_brute_force which will really be reducing the workload.