(feature) support client certificate in http retriever

[thomaschaaf]

Requirements

It would be great if you could send a client certificate with the http retriever.

[thomaschaaf]

/assign-me

[github-actions]

👋 Hey @thomaschaaf, this issue is already assigned to @thomaspoignant.

⚠️ It will become unassigned if it isn't closed within 20 days.

🔧 A maintainer can also add you to the list of assignees or swap you with the current assignee.

[thomaspoignant]

Hey @thomaschaaf yes it could be a great idea.
I've assigned you the issue if you want to work on it.