fix(cdsctl): do not ask service question if there is no service name

[sguiheux]

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@ovh/cds

[ovh-cds]

CDS Report build-all-cds#18593.0 ✘

• Build
  • Build and Package All ✔
  • Build Debpacker ✔
  • Build OS-Ansible-Inventory ✔
  • Build SMTPMock ✔
  • Lint UI Translate ✔
  • Test CLI ✔
  • Test Engine ✔
  • Test SDK ✔
  • Test UI ✔
• Package
  • Docker ✔
• Integration
  • Docker Compose Tests ✔
  • Standalone Tests ✘

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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