Add Azure identity fields to data plane details popup

[GregorShear]

Closes #1917

Summary

• Adds azure_application_name and azure_consent_link to BaseDataPlaneQuery and the Supabase column query
• Adds an MS Azure tab to the Service Account Identity ToggleField — tab is automatically hidden when azure_application_name is null (no 'not available' placeholder, matching the acceptance criterion to hide the tab when unconfigured)
• Adds a conditional DataPlaneDialogField for the consent link with a copy button, shown only when azure_consent_link is non-null
• Adds i18n strings data.azureApplicationName and data.azureConsentLink

Notes for backend

The azure_consent_link field is assumed to be stored directly on data_planes. If it ends up being derived from a azure_client_id or similar, only the column name in COLUMNS and BaseDataPlaneQuery need updating — the UI logic is the same either way.

Test plan

• Open the data plane details popup for a data plane with Azure configured — Azure tab appears in Service Account Identity with the application name and copy button; consent link field appears below
• Open the popup for a data plane without Azure configured — Azure tab is hidden; consent link field is hidden
• Verify AWS and GCP tabs are unaffected