isort: Support disabling sections with ``no-sections = true`` (#8657)
## Summary
This adds a ``no-sections`` option for isort in the linter, similar to
the ``no_sections`` option that exists in upstream isort
(https://pycqa.github.io/isort/docs/configuration/options.html#no-sections)
This option puts all imports except for ``__future__`` into the same
section, and is mostly used by monorepos.
I've taken a bit of a leap in assuming that ruff wants to support the
exact same option; more than happy to refactor if you'd prefer a
different way of setting this up.
Fixes #8653
## Test Plan
I've added a test and have run it on a large Python codebase that uses
isort with --no-sections. The option is disabled by default.
ruff
9d76e4e0 - isort: Support disabling sections with ``no-sections = true`` (#8657)
