Python linting through ruff

[kieran-ryan]

Replace flake8 with ruff for linting Python code.

Context

Replace flake8 with ruff for linting Python code.

• pyproject.toml support
• Monorepo support
  • Respects configuration from root and within each package - run poe linter or ruff check from any location
  • IDE support during development - rather than relying on disparities between local task runs, CI, etc.
• Multiple times faster
• Hundreds of rules, without requiring external plugins and dependencies
  • Can subsequently be extended for formatting and other linting criteria - though scoped to parity with this pull request
• and more

Dropped legacy Jenkins linting configuration.

Checklist

• Sign Allure CLA