Add option to ignore N812 for specific packages

[usamec]

This typical ML idiom:
import torch.nn.functional as F (see https://github.com/pytorch/examples/blob/main/mnist/main.py#L5)

gets flagged as:
N812 Lowercase functional imported as non-lowercase 'F'

I would like to have an option to enable using this specific package without having to write noqa on every import line or disabling N812 entirely. Is it possible?

[saravanabalagi]

Also when using lightning, I get:
N812 Lowercase lightning imported as non-lowercase L

[j-4]

same holds true for pyspark, where

from pyspark.sql import functions as F
from pyspark.sql import types as T

are unwritten standards.