Enable, fix RUF lint rules, a bit more dataclass conversion

contrib/c-integer-semantics.py

contrib/mem-pattern-explorer/pattern_vis.py

doc/conf.py

examples/python/ispc-stream-harness.py

loopy/__init__.py

loopy/auto_test.py

loopy/check.py

loopy/codegen/__init__.py

loopy/codegen/control.py

loopy/codegen/instruction.py

loopy/codegen/result.py

loopy/frontend/fortran/__init__.py

loopy/frontend/fortran/expression.py

loopy/frontend/fortran/translator.py

loopy/frontend/fortran/tree.py

loopy/kernel/__init__.py

loopy/kernel/array.py

loopy/kernel/creation.py

loopy/kernel/data.py

loopy/kernel/function_interface.py