LF-4351: Other purpose text is not saved

[SayakaOno]

Description

• Set ``OTHER_PURPOSE_ID` in useEffect.
• Remove value and defaultValue from the input to avoid the controlled/uncontrolled warning.
• Remove out-dated comment.

Jira link: https://lite-farm.atlassian.net/browse/LF-4351

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• Passes test case
• UI components visually reviewed on desktop view
• UI components visually reviewed on mobile view
• Other (please explain)

Checklist:

• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• The precommit and linting ran successfully
• I have added or updated language tags for text that's part of the UI
• I have added "MISSING" for all new language tags to languages I don't speak
• I have added the GNU General Public License to all new files

[kathyavini]

I have never been able to get this behaviour happening locally to test, but the code change makes sense!

[SayakaOno]

Thank you @kathyavini ! The reproduction rate is 100% for me so far; it needs to be started without purposes in the Redux store (testing right after logging in is the easiest), and if you run it with a throttle, you might be able to see it too. (But no need to re-test :) )

[Duncan-Brain]

Fixes it for me!

[kathyavini]

@SayakaOno ah okay thank you! With throttling I was able to see the query still pending with the page loaded and the value missing!! I was thinking of this in the wrong way entirely then because I had assumed the undefined was just the form's initial load behaviour and not the actual value being missing (or if I had known about the missing value, I had forgotten by today 😂)