Enable quotes linting, fix quotes

.github/workflows/ci.yml

.gitlab-ci.yml

examples/python/global_barrier_removal.py

examples/python/hello-loopy.py

examples/python/rank-one.py

loopy/check.py

loopy/cli.py

loopy/codegen/instruction.py

loopy/expression.py

loopy/frontend/fortran/__init__.py

loopy/kernel/creation.py

loopy/kernel/data.py

loopy/kernel/instruction.py

loopy/kernel/tools.py

loopy/library/reduction.py

loopy/schedule/__init__.py

loopy/statistics.py

loopy/target/c/__init__.py

loopy/target/c/c_execution.py

loopy/target/c/codegen/expression.py