add `forEach` function to `ABC.Interpreter.JavaScript` module

What does this MR do?

This adds a forEach function for JS arrays which seems commonly useful enough to put it here. We currently already have two projects using the function.

Changes to public APIs

Adds forEach function to ABC.Interpreter.JavaScript module.

Author's checklist (required)

• Intermediate commits compile (use git rebase -i main if not)
• Newly added code has a style consistent with the rest of the repository
• Newly added code is documented (guidelines)
• If bugs have been solved, tests have been added (guidelines)
• A changelog entry has been added (guidelines)

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