Hygiene connector displays user's name for enrichment actions

[NiQuintin]

Description

When creating an observable, the Hygiene connector seems to be using certain user's name for enriching the observable (not necessarily the name of the creator, it may be a completely different user).

Environment

OpenCTI 5.12.29

Reproducible Steps

Steps to create the smallest reproducible scenario:

1. Choose a domain name for instance here and create it in the OCTI instance
2. The hygiene connector will "impersonate" a user to replace the score, add hygiene to the label and add references.

Expected Output

Connector must display its own name for enrichment actions.

Actual Output

The connector impersonates certain users to display the origin of the enrichment.

Additional information

Example here: https://testing.octi.staging.filigran.io/dashboard/observations/observables/e9adde24-4e07-428e-9173-0e30cfc5404a

Screenshots (optional)

[yassine-ouaamou]

Even when it's another user than yassine.ouaamou who creates the observables, it's the same user who is impersonated:
https://testing.octi.staging.filigran.io/dashboard/observations/observables/1f534482-ebd4-4b7e-b151-8a8c92a1e94c
https://testing.octi.staging.filigran.io/dashboard/observations/observables/befa2a29-82a1-4661-b9cc-053ca24ecd80

[Jipegien]

@helene-nguyen & @Megafredo can you take a look when available ?

[helene-nguyen]

Yes, we will take a look @Jipegien :)

[labo-flg]

I let you guys do it @helene-nguyen or @Megafredo ;)

[richard-julien]

Will be handled by #6042