Reduce `tool.ruff.lint.ignore`

Nobody has claimed this yet.

ae51153db2e623e8b9fb3609de3a6ad976addd0a enabled ruff-check in pre-commit.
I added a bunch of rules to "ignore" list but I think there are too many "ignore"s:
https://github.com/Lightning-AI/lightning-thunder/blob/ae51153db2e623e8b9fb3609de3a6ad976addd0a/pyproject.toml#L153-L176.

- [ ] "E731", # Do not assign a lambda expression, use a def
- [ ] "E501", # todo: Line too long (235 > 120 characters
- [ ] "F841", # https://docs.astral.sh/ruff/rules/unused-variable/
- [ ] "F821", # https://docs.astral.sh/ruff/rules/undefined-name/
- [ ] "E402", # https://docs.astral.sh/ruff/rules/module-import-not-at-top-of-file/
- [ ] "F401", # https://docs.astral.sh/ruff/rules/unused-import/
- [ ] "F405", # https://docs.astral.sh/ruff/rules/undefined-local-with-import-star-usage/
- [ ] "E712", # https://docs.astral.sh/ruff/rules/true-false-comparison/
- [ ] "E711", # https://docs.astral.sh/ruff/rules/none-comparison/
- [ ] "E721", # https://docs.astral.sh/ruff/rules/type-comparison/
- [ ] "E722", # https://docs.astral.sh/ruff/rules/bare-except/
- [ ] "F403", # https://docs.astral.sh/ruff/rules/undefined-local-with-import-star/
- [ ] "F601", # https://docs.astral.sh/ruff/rules/multi-value-repeated-key-literal/
- [ ] "F822", # https://docs.astral.sh/ruff/rules/undefined-export/
- [ ] "F842", # https://docs.astral.sh/ruff/rules/unused-annotation/
- [x] "F722", # https://docs.astral.sh/ruff/rules/forward-annotation-syntax-error/
- [x] "E702", # https://docs.astral.sh/ruff/rules/multiple-statements-on-one-line-semicolon/
- [ ] "E741", # https://docs.astral.sh/ruff/rules/ambiguous-variable-name/
- [x] "W293", # https://docs.astral.sh/ruff/rules/blank-line-with-whitespace/
- [ ] "F811", # https://docs.astral.sh/ruff/rules/redefined-while-unused/
- [x] "W291", # https://docs.astral.sh/ruff/rules/trailing-whitespace/

cc @borda @mruberry

Start with pyproject.toml lines 153-176 and the commit that enabled ruff-check in pre-commit. Review each unchecked rule in the ignore list, locate its current violations, and determine whether the code or configuration should change. Done means the selected ignores are removed and the pre-commit ruff check passes without introducing those violations.

Written by the indexing model from the issue text.