feat: added support to send modelica resource uri's as modifiers

[abhilash-kumar-nair]

Story - CAP-909

import os
from modelon.impact.client import Client
from modelon.impact.client.experiment_definition.modifiers import Enumeration
from modelon.impact.client.experiment_definition.operators import Choices

client = Client(url='https://jhmi-staging.modelon.com', interactive=True)
workspace = client.get_workspace("test")
dynamic = workspace.get_custom_function("dynamic")
model = workspace.get_model("FileUri")
library = "Modelica"
resource_path_1 = "Resources/Data/Electrical/Digital/Memory_Matrix.txt"
modelica_resource_uri_1 = workspace.get_modelica_resource_uri(
    library, resource_path_1
)
resource_path_2 = "Resources/Data/Utilities/Test_RealMatrix_v7.mat"
modelica_resource_uri_2 = workspace.get_modelica_resource_uri(
    library, resource_path_2
)
exp_def = model.new_experiment_definition(dynamic).with_modifiers({"fileName":Choices(modelica_resource_uri_1, modelica_resource_uri_2)})
res = workspace.execute(exp_def).wait()

[iakovn]

I believe the implementation is sound. I would like to wait a bit with and test with the compiler and backend versions that are due in a couple of weeks.