Fix profile editor bug on SaaS

What does this MR do and why?

Related issue: https://jihulab.com/gitlab-cn/gitlab/-/issues/3261

Related MR: !1803 (merged)

Root reason:

The upstream modified the user parameter in controller, causing jh's pipeline to fail, and the wrong param fixing caused this bug.

This bug will only trigger when the phone_verification_code_enabled is turned on, so the unit test has no early warning.

How to fix:

• Add new unit tests to cover the bug cases;
• Refactor user new_user params key, make them automatically adapt to changes.

Screenshots or screen recordings

Run new UT on main-jh	Run new UT on this branch

How to set up and validate locally

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