Fix huggingface_hub imports for compatibility with newer versions

[rxu183]

Changes:

• Fixes cached_download deprecated in huggingface_hub 26.0 #124
• Replaced cached_download with urllib.request on community pipeline logic (let me know if there's a better solution, this was just a simple thing I could think of), and removed associated version checking logic that was no longer needed.
• Replaced HfFolder.get_token with get_token (import error on HfFolder)
• Replaced deprecated use_auth_token parameter with token in hf_hub_download calls
• Replaced hf_cache_home with HF_HOME in constants.py

Relevant HF code for HF_HOME

https://github.com/huggingface/huggingface_hub/commit/a1b90fa3c445a9be4438a259f1e4a25ec79db66a
(v0.20.0)
HF_HOME = os.path.expanduser(
    os.getenv(
        "HF_HOME",
        os.path.join(os.getenv("XDG_CACHE_HOME", default_home), "huggingface"),
    )
)
hf_cache_home = HF_HOME  # for backward compatibility. TODO: remove this in 1.0.0

Should be compatible with requirement of hugging_face_hub >= 0.30.2, tested on oldest and newest versions.
Previously, was getting errors on newer versions of hugging_face_hub.

Testing:

• Tested on Google Colab v5e1

Logs/Setup

import os
!git clone https://github.com/rxu183/maxdiffusion.git
!git checkout richard/hf_hub_download
os.chdir('/content/maxdiffusion')
!pip install -r requirements.txt
!pip install .
!pip install huggingface_hub==0.30.2 # comment out for new version test
from maxdiffusion.utils.dynamic_modules_utils import get_cached_module_file
# Success Test
result = get_cached_module_file("clip_guided_stable_diffusion", "clip_guided_stable_diffusion.py")
print(f"Resolved to: {result}", flush=True)

# Failure Test
try:
    get_cached_module_file("fake_input", "xyz.py")
except EnvironmentError as e:
    print(f"{e}")

............ pip setup logs ............

Resolved to: diffusers_modules/git/clip_guided_stable_diffusion.py
Could not locate the xyz.py inside fake_input.
Failed to download community pipeline from https://raw.githubusercontent.com/huggingface/diffusers/v0.22.0/examples/community/fake_input.py. Please check if the url is correct.