Change CairoPie serialization

[pefontana]

We need to make some changes in the deserialization of the CairoPie struct, to make it equal to the Python VM one:

• Change the CairoPie.program.data

// python program data
        "data": [
            4613515612218425344,
            100,
            5188850460319907840,
            4613515612218425344,
            200,
            5188850464614875136,
            4613515612218425344,
            300,
            5188850468909842432,
            5198983563776458752,
            3,
            2345108766317314046
        ],
// rust program data
"data": [
      {
        "Int": {
          "value": {
            "val": [
              2147450880,
              1074167809
            ]
          }
        }
      },
      {
        "Int": {
          "value": {
            "val": [
              100
            ]
          }
        }
      },
      {

I think we can change this by adding a serialize implementation to the data field

pub struct StrippedProgram {
    #[serde(serialize_with = "X")]
    pub data: Vec<MaybeRelocatable>,
    pub builtins: Vec<BuiltinName>,
    pub main: usize,
}

Also, i think it would be more clean to move the definition of the StrippedProgram struct to the vm/src/vm/runners/cairo_pie.rs module.

• Change CairoPie.additional_data serialization

// python additional data
{
    "output_builtin": {
        "pages": {},
        "attributes": {}
    }
}
// rust additional data
{
  "output_builtin": {
    "Output": {
      "pages": {},
      "attributes": {}
    }
  }
}

• The CairoPie.metadata.program serialization should include the prime field

Remainder: Dont forget to implement this changes also with the lambdaworks feature