[supervisor] Improve IDE readiness probe

[aledbf]

Description

• Reduce test window
• Properly close body response

Release Notes

[supervisor] Improve IDE readiness probe

[aledbf]

/werft run

👍 started the job as gitpod-build-aledbf-ide.1
(with .werft/ from main)

[jeanp413]

Status readiness for vscode browser is broken now 😅
I think only this should be inside the loop, response parsing etc should be after breaking the loop

	resp, err := client.Get(url)
	if err != nil {
		log(...)
	}

	if resp.StatusCode == http.StatusOK {
              break;
	}

[aledbf]

@jeanp413 ready for another review

[jeanp413]

Works for vscode browser, desktop and jetbrains