[W1][Report][6699][Move Negative Sales Lines] Replace FromDocType, ToDocType, and ToDocType2 Option variables with extensible Enums

Why do you need this change?

The Move Negative Sales Lines report uses the global variables FromDocType, ToDocType, and ToDocType2, all of which are of type Option to determine the supported document types.

Since Option variables are not extensible, partners and ISVs cannot introduce additional document types through a report extension. This forces direct Base Application modifications for scenarios that should otherwise be supported through extensibility.

Replacing these option variables with extensible enums would enable extension-based customizations while preserving the existing report behavior.

Describe the request

Our extension introduces additional sales document types that need to participate in the Move Negative Sales Lines process.

The report determines the source and destination document types using the global option variables FromDocType, ToDocType, and ToDocType2. Because these are Option variables, there is currently no supported way to add new document types through a report extension.

Replacing these variables with extensible enums would provide a supported extensibility point, allowing partners and ISVs to extend the report without requiring Base Application customizations.
Internal work item: AB#642554

Locate the Move Negative Sales Lines report and inspect the declarations and uses of FromDocType, ToDocType, and ToDocType2. Confirm that the change preserves existing report behavior while allowing additional document types through report extensions; the issue does not name a specific file or test.