[Feature] Handle repeated non standard arguments

[hjoaquim]

1. Why? (1-3 sentences or a bullet point list):

   • Need to properly handle repeated (used in more than one provider) non-standard arguments - which Argparse can't handle out-of-the-box since it doesn't allow arguments with the same name.

2. What? (1-3 sentences or a bullet point list):

   • Check if the argument already exists, if not add it to the provider group. If the argument exists, check if it's a standard already and don't add it to any other group; if it's not a standard, remove it from previously added groups and add it to the standard instead.
   • If the choices differ, update them to accommodate all the available options and let the Platform handle the errors.
   • Update the help message with the available providers.

3. Impact (1-2 sentences or a bullet point list):

   • NA

better usability since it removes a "bug" where the user was only able to use a given repeated non standard argument for one provider.

4. Testing Done:

   • Any Platform command where this happens, eg: the adjustment arg on /equity/price/historical

5. Reviewer Notes (optional):

   • NA

6. Any other information (optional)

Before

only available for one provider

After

available in the optional arguments so it can be used with multiple providers, also with all the available choices and with specifying the available providers in the help message