[Chore] Replace all base64 usages with faster pybase64 package (#37290)

Signed-off-by: Isotr0py <mozf@mail2.sysu.edu.cn>

examples/pooling/token_embed/colqwen3_token_embed_online.py

@@ -21,10 +21,10 @@ Then run this script:
 """
 
 import argparse
-import base64
 from io import BytesIO
 
 import numpy as np
+import pybase64 as base64
 import requests
 from PIL import Image