fix(vtkmath): applied type consistency for parameters and return types of math functions (vtkMath)

Export definitions in vtkMath (Math\index.d.ts) lacked consistency in their parameter and return
types. Changes were made to function signatures where the implementations assume a fixed size for
number[] parameter and return type. They were replaced with appropriate vec2, vec3, vec4, mat3, and
mat4.

Author: Shreeraj Jadhav