Fix vue3 jest failure

What does this MR do and why?

closes #2754 (closed)

Fix vue3 jest failure

Fix 'jh/spec/frontend/pages/password/phone_code_verification_spec.js'

for...of... would throw error _args$.includes is not a function, Error: Caught error after test environment was torn down somehow, here changes it to a equal for...in, and removes some redundant code

Screenshots or screen recordings

How to set up and validate locally

env VUE_VERSION=3 yarn run jest 'jh/spec/frontend/pages/password/phone_code_verification_spec.js'

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