Debug log, logging improvements (#3159)

* simplify logging

* remove comment

* progress on debug.log

* add debug-level logger for file log

* simplify

* case insensitivity; 3rd party logging improvements

* simplify

* fix

* tests

* lint

* nits

* nit

* Update tests/test_utils_tee.py

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* cleanup / comments

* fix

* oops

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

examples/colab-notebooks/colab-axolotl-example.ipynb

@@ -251,10 +251,10 @@
    },
    "outputs": [],
    "source": [
-    "from axolotl.utils import patch_optimized_env\n",
+    "from axolotl.utils import set_pytorch_cuda_alloc_conf\n",
     "\n",
-    "# speedup downloads from HF 🤗 and set \"PYTORCH_CUDA_ALLOC_CONF\" env to save memory\n",
-    "patch_optimized_env()"
+    "# Set \"PYTORCH_CUDA_ALLOC_CONF\" env to save memory\n",
+    "set_pytorch_cuda_alloc_conf()"
    ]
   },
   {