Add TTY check for providing missing config values

[ramo-j]

This change adds a check for a TTY before asking for missing config values. In scenarios where a TTY is not present (such as downstreams' dftimewolf using curses display) the UI will block indefinitely, but a user will not be able to tell why.

Checks

• [ ] All tests succeed.
• [ ] Unit tests added.
• [ ] e2e tests added.
• [ ] Documentation updated.

Closing issues

Closes #2849