fix: Cross filters initial scope

[michael-s-molina]

SUMMARY

This PR fixes a bug in the initialization of cross filters scope. The algorithm was not considering dashboards that were created before DASHBOARD_CROSS_FILTERS was enabled. metadata.global_chart_configuration.scope might not exist and that was generating an error.

Fixes #25064

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

• Create a dashboard with DASHBOARD_CROSS_FILTERS disabled
• Enable DASHBOARD_CROSS_FILTERS
• Navigate to the created dashboard
• It should not throw the mentioned error

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[trixieboyle]

SUMMARY

This PR fixes a bug in the initialization of cross filters scope. The algorithm was not considering dashboards that were created before DASHBOARD_CROSS_FILTERS was enabled. metadata.global_chart_configuration.scope might not exist and that was generating an error.

Fixes #25064

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

• Create a dashboard with DASHBOARD_CROSS_FILTERS disabled
• Enable DASHBOARD_CROSS_FILTERS
• Navigate to the created dashboard
• It should not throw the mentioned error

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API