Prevent autocomplete on mfa entry fields

[LMNTL]

Checklist

1. If you've added code that should be tested, add tests
2. If you've changed APIs, update (or create!) the documentation
3. Ensure the tests pass
4. Make sure that your code lints and that you've followed our coding style
5. Write a title and, if necessary, a description of your work suitable for publishing in our release notes
6. Mention any related issues in this repository (as #ISSUE) and in other repositories (as kobotoolbox/other#ISSUE)
7. Open an issue in the docs if there are UI/UX changes

Description

Prevent MFA token input fields from being autocompleted.

Notes

Adds an optional disableAutocomplete prop to <TextBox>.

[notion-workspace]

Remove autocomplete from MFA token field

[magicznyleszek]

I think linter will complain that disableAutocomplete is enough (i.e. without ={true})

[LMNTL]

Good catch! I always forget about that 😅