IA-4719: add missing translations

[quang-le]

What problem is this PR solving?

Some project feature flag translations were missing

Related JIRA tickets

IA-4719

Changes

Explain the changes that were made.

The idea is not to list exhaustively all the changes made (GitHub already provides a full diff), but to help the reviewers better understand:

• which specific file changes go together, e.g: when creating a table in the front-end, there usually is a config file that goes with it
• the reasoning behind some changes, e.g: deleted files because they are now redundant
• the behaviour to expect, e.g: tooltip has purple background color because the client likes it so, changed a key in the API response to be consistent with other endpoints

How to test

Go to projects
Switch language to FR
click create
go to feature flags tab ("Options")
Expand all sections:

• All feature flags should be translated
• all feature flags should have a translated tooltip (hover on left icon)

Notes

Expected translations available in the Jira ticket