[Subcontracting] Exclude Components of subcontracting type "Transfer" from Planning

[SPinkow]

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Summary

This pull request introduces enhancements to the subcontracting planning logic, specifically ensuring that production order components with certain subcontracting types are excluded from planning suggestions. It also adds comprehensive tests to verify this behavior and refines some test data setup.

Subcontracting Planning Logic Improvements:

• Added event subscribers in SubcPlanningLineMgmtExt.Codeunit.al to exclude production order components with "Purchase" or "Transfer" subcontracting types from the planning engine, preventing requisition lines from being suggested for these components.
• Updated namespace imports in SubcPlanningLineMgmtExt.Codeunit.al to support new logic.

Testing Enhancements:

• Added two new tests in SubcSubcontractingTest.Codeunit.al:
  • PurchaseSubcTypeProdOrderCompExcludedFromPlanning verifies that components with subcontracting type "Purchase" are excluded from planning.
• Added helper procedure UpdateProdOrderComponentWithSubcontractingType to streamline test setup for changing subcontracting types in production order components.
• Updated test data setup to use InventoryByVendor instead of "Purchase" in one scenario to better align with the new logic.

Work Item(s)

Fixes AB#630597

[SPinkow]

@ChethanT