Extracted from, and improved over #2100
These were found by running ruff . --select=C4 --exclude=build --exclude=Pythonwin/Scintilla --exclude=adodbapi
Documentation: https://beta.ruff.rs/docs/rules/#flake8-comprehensions-c4

This PR uses more modern collection literals and comprehensions where applicable. There's some expected performance gains here from the use of comprehensions and less function call overhead. On top of often more concise syntax