Rename method _get_gpt4all_answer to _get_answer

[Prikshit7766]

Description

This pull request updates the GPT4ALLLlm class in the codebase. The primary change is to rename the method _get_gpt4all_answer to _get_answer.

Fixes # (issue)

##657

Please delete options that are not relevant.

• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (does not change functionality, e.g. code style improvements, linting)
• Documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

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• Unit Test
• Test Script (please provide)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

Maintainer Checklist

• closes Rename _get_gpt4all_answer to _get_answer in gpt4all llm class #657
• Made sure Checks passed

[taranjeet]

looks good. thanks