Should `Complex.magnitude` use call to `complex.abs` instead of plain `@sqrt`?

[DanikVitek]

Currently, the Complex.hypot uses a simple call to @sqrt, which is ok (and probably better?) for small numbers:

zig/lib/std/math/complex.zig

Line 116 in d590b87

return @sqrt(self.re * self.re + self.im * self.im);

But there is already a dedicated function for calculating an absolute of a complex number, that references math.hypot:

zig/lib/std/math/complex/abs.zig

Lines 7 to 10 in d590b87

	/// Returns the absolute value (modulus) of z.
	pub fn abs(z: anytype) @TypeOf(z.re, z.im) {
	return math.hypot(z.re, z.im);
	}

Which in turn states that it avoids unnecessary overflow and underflow:

zig/lib/std/math/hypot.zig

Lines 13 to 23 in d590b87

	/// Returns sqrt(x * x + y * y), avoiding unnecessary overflow and underflow.
	///
	/// Special Cases:
	///
	/// | x | y | hypot |
	/// |-------|-------|-------|
	/// | +-inf | any | +inf |
	/// | any | +-inf | +inf |
	/// | nan | fin | nan |
	/// | fin | nan | nan |
	pub fn hypot(x: anytype, y: anytype) @TypeOf(x, y) {