Setting name for gitrepository/kustomization

[grzegorzgniadek]

What this PR does / why we need it:

Feature that add ability to set custom name for gitrepository/kustomization flux-sync resources

Special notes for your reviewer:

Checklist

• [ ] DCO signed
• [ ] Chart Version bumped
• [ ] helm-docs are updated
• [ ] Helm chart is tested
• [ ] Update artifacthub.io/changes in Chart.yaml
• [ ] Run make reviewable