fix: Prevent string discrete values which are string of numbers from passing as numeric condition values.

[RSam-NI]

• This contribution adheres to CONTRIBUTING.md.

What does this Pull Request accomplish?

• It makes sure that string discrete values are correctly passing as string condition values numeric discrete values are correctly passing as numeric condition values.
• Data type of discrete value of NumericConditionValue is set to List[Union[StringFloat, StrictInt]]. Used StrictFloat and StrictInt because we only need integer and float values to be stored here and not string of numbers. If int/float are used, pydantic tries to convert the string of numbers into float/int.
• Data type of discrete value of StringConditionValue is set to StrictStr. Used StrictStr beause, we only want strings to be stored here and not any other datatypes. If str is used, pydantic converts any other datatypes to string and stores it.

Why should this Pull Request be merged?

• String discrete values which has string of numbers are being converted into numeric condition values.
• This PR has changes which converts such discrete values correctly as string condition values. And also makes sure that real numeric discrete values are being converted into numeric condition values.

What testing has been done?

Automated integration tests are included.