Fix JS lint errors in src/mongo/shell & src/mongo/scripting with ESLint --fix

ESLint can automatically fix some linting errors with --fix. We should fix the following categories of errors to make our JavaScript work better with token-based formatters like clang-format:

1. no-extra-semi
2. semi

To make it easier to review the changes and parallelize work, this task will be scoped to the JS in src/mongo/shell & src/mongo/scripting.