langchain: clean pyproject ruff section (#30070)

## Changes
- `/Makefile` - added extra step to `make format` and `make lint` to
ensure the lint dep-group is installed before running ruff (documented
in issue #30069)

- `/pyproject.toml` - removed ruff exceptions for files that no longer
exist or no longer create formatting/linting errors in ruff

## Testing

**running `make format` on this branch/PR**
<img width="435" alt="image"
src="https://github.com/user-attachments/assets/82751788-f44e-4591-98ed-95ce893ce623"
/>

## Issue

fixes #30069

---------

Co-authored-by: Chester Curme <[email protected]>

Makefile

@@ -2,7 +2,6 @@
 
 .EXPORT_ALL_VARIABLES:
 UV_FROZEN = true
-UV_NO_SYNC = true
 
 ## help: Show this help info.
 help: Makefile

pyproject.toml

@@ -80,9 +80,6 @@ ignore-words-list = 'momento,collison,ned,foor,reworkd,parth,whats,aapply,mysogy
 
 [tool.ruff]
 extend-include = ["*.ipynb"]
-extend-exclude = [
-    "docs/docs/expression_language/why.ipynb", # TODO: look into why linter errors
-]
 
 [tool.ruff.lint]
 select = ["D"]
@@ -96,9 +93,4 @@ pydocstyle = { convention = "google" }
     "F841", # allow assignments to variables that are never read -- it's example code
 
 ]
-"!libs/langchain/langchain/model_laboratory.py" = ["D"]
-
-# These files were failing the listed rules at the time ruff was adopted for notebooks.
-# Don't require them to change at once, though we should look into them eventually.
-"cookbook/gymnasium_agent_simulation.ipynb" = ["F821"]
-"docs/docs/integrations/document_loaders/tensorflow_datasets.ipynb" = ["F821"]
+"!libs/langchain/langchain/model_laboratory.py" = ["D"]