[BUG] Semstrings not used for by_llm function call arguments

[Jayanaka-98]

Describe the bug
When using a previously defined variable (with semstrings) with by llm as a function call argument, the semstring of the variable is not being used for the generated prompt. Instead any semstring defined for the argument will be used.

To Reproduce

import:py from jaclang.core.llms, Anthropic;
glob llm = Anthropic(model_name="claude-3-sonnet-20240229");

glob pet_name: 'name of a pet dog' : str = 'Jim';

can 'What species it belongs to'
find( pet_name: 'name of a pet' : str) -> species by llm();

with entry {
    print(find(pet_name));
} 

Jaclang/Python Version
Python = 3.12.2
Jaclang = 0.5.18

[marsninja]

This is interesting, I think really both semstrings should be used with the llm and the aott prompt gen should somehow frame it in the context properly. This needs discussion for sure.