Invastigate issues with complex_calculator test

[ksew1]

When executing coverage analysis on the complex_calculator project, two primary issues have been identified:

1. Function Declaration Hitability:

   • Problem: Inconsistent marking of function declarations as hittable/non-hittable.

     • Examples (Hittable): divide, factorial, power, fibonacci, is_prime
     • Examples (Non-hittable): add, subtract, multiply, unsafe_divide

   • Expected Behavior: Function declarations should consistently be marked as non-hittable, as they do not represent executable lines of code.

     Suspicions: All not hittable declarations are one line functions

2. Result Assignment Coverage in is_prime:

   • Problem: The declaration and assignment of the result variable in the is_prime function are incorrectly marked as hittable, and worse, the assignment is marked as not hit despite it being executed.

   • Expected Behavior: Result declaration and assignment should be non hittable

     Suspicions: result variable is declared as mut

[ksew1]

2. Sometimes compiler produces enum_init<core::bool, > which is never executed by vm. Compiler team says this is working as expected. So probably we should mark instructions like enum_init<core::bool, > not executable.