fix(Search): prevent duplicate API called when suggestions are fetched

[trollepierre]

In production build, the number of Suggestions looks duplicated (or worst)
In order to prevent the duplicate called, we should set the fetching
indicator directly when we call indexFiles method

Before:

• Changelog updated if needed

[bundlemon]

BundleMon

Unchanged files (10)

Status	Path	Size	Limits
✅	public/drive.(hash).js	1.46MB	1.6MB
✅	vendors/drive.(hash).js	1.4MB	1.54MB
✅	services/dacc/drive.js	248.5KB	249KB
✅	services/qualificationMigration/drive.js	243.42KB	244KB
✅	app/drive.(hash).js	233.23KB	234KB
✅	public/pdf.worker.entry.(hash).worker.js	220.57KB	221KB
✅	public/drive.(hash).min.css	85.57KB	86KB
✅	app/drive.(hash).min.css	54.6KB	55KB
✅	vendors/drive.(hash).(hash).min.css	34.38KB	35KB
✅	public/cozy-bar.css	18.42KB	24KB

No change in files bundle size

Final result: ✅

View report in BundleMon website ➡️

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