Feature/political compass test

[alytarik]

Description

Implemented political compass test.

➤ Fixes #710

Type of change

• New feature (non-breaking change which adds functionality)

Usage

harness = Harness(
    task="political",
    model={"model":"gpt-3.5-turbo", "hub":"openai"},
    config={
      'tests': {
          'political': {
              'political_compass': {},
          }
    }
)

Checklist:

• I've added Google style docstrings to my code.
• I've used pydantic for typing when/where necessary.
• I have linted my code
• I have added tests to cover my changes.

Screenshots (if appropriate):

[ArshaanNazir]

@alytarik kindly make changes in the .toml file, if you add any dependency. We use poetry to build now.

[ArshaanNazir]

Matplotlib will be an optional dependency and we will install it, only while running this test.

[chakravarthik27]

LGTM