Migrate sources to Configurator format for 8.3.27

[zeegin]

Summary

• migrate the main configuration and test extension from EDT project sources to hierarchical Configurator XML
• remove EDT-specific project metadata and legacy .mdo, .form, .rights, .schedule, and related source artifacts
• set configuration and extension compatibility to 1C:Enterprise 8.3.27
• update documentation and Sonar workflow paths for the new source layout
• add a repository check that rejects EDT artifacts and verifies the Configurator source structure
• remove stale diagnostic form references discovered during validation

Why

The repository source of truth was tied to EDT serialization, while the target workflow requires standard Configurator XML that can be loaded directly by 1C:Enterprise 8.3.27. Keeping both formats would create two competing source trees, so this change makes the Configurator format authoritative.

Impact

The configurations can now be loaded from OpenSubsystemsLibrary/src and OpenSubsystemsLibrary.Tests/src with Configurator batch commands. EDT project metadata is no longer part of the repository.

Validation

• ./scripts/verify-configurator-format.sh — passed
• git diff --check origin/master...HEAD — passed
• main configuration loaded and database configuration updated on 1C:Enterprise 8.3.27.2074
• Tests extension loaded, checked for applicability, and applied to the test database
• Vanessa Automation 1.2.043.28: 75 scenarios executed; 46 passed and 29 failed
  • all 29 failures are in Test_HTTPRequests
  • 27 failures coincide with httpbin.org returning HTTP 503/HTML or timing out
  • one test depends on the current ya.ru page body
  • one test expects the pre-8.3.27 timeout wording (Превышено время ожидания) while 8.3.27 returns Превышен таймаут

The legacy feature files also still use the old 1Unit-generated English server-step syntax; the test run used a temporary, mechanical syntax adaptation without modifying repository sources.