fix: Fixed `ruff` configuration to avoid deprecated configuration warning (#30179)

* Fixed deprecated ruff configuration in pyproject.toml file

* reverted un-necessary changes.

* small fix.

pyproject.toml

 [tool.ruff]
+line-length = 119
+
+[tool.ruff.lint]
 # Never enforce `E501` (line length violations).
 ignore = ["C901", "E501", "E741", "F402", "F823" ]
 select = ["C", "E", "F", "I", "W"]
-line-length = 119
 
 # Ignore import violations in all `__init__.py` files.
-[tool.ruff.per-file-ignores]
+[tool.ruff.lint.per-file-ignores]
 "__init__.py" = ["E402", "F401", "F403", "F811"]
 "src/transformers/file_utils.py" = ["F401"]
 "src/transformers/utils/dummy_*.py" = ["F401"]
 
-[tool.ruff.isort]
+[tool.ruff.lint.isort]
 lines-after-imports = 2
 known-first-party = ["transformers"]
 
@@ -33,4 +35,4 @@ doctest_glob="**/*.md"
 markers = [
     "flash_attn_test: marks tests related to flash attention (deselect with '-m \"not flash_attn_test\"')",
     "bitsandbytes: select (or deselect with `not`) bitsandbytes integration tests",
-]
+]
\ No newline at end of file