[Master] - Bug 646815 [Expense Agent] Obsolete country-specific demo data, consolidating into single W1 app

[v-rohangarg20]

Workitem Bug 646815: [master] [Expense Agent] [Demo Data] Obsolete country-specific demo data, consolidating into single W1 app

Fixes AB#646815

Issue: After the Expense Agent demo data was consolidated into a single W1 app, the old country-specific demo data codeunits (AT, AU, CA, DE, DK, ES, FR, GB, NZ, US) were still present and active. Keeping them alongside the consolidated W1 demo data caused duplicated demo data generation and left dead, redundant objects in the country apps that needed a clean deprecation path before removal.

Cause: Each country still shipped its own set of Expense demo data codeunits — G/L accounts, posting groups, employee posting-group updates, expense categories/subcategories, rule headers/conditions, expenses, posted expense reports, and the Exp. Contoso Localization subscribers. These are now superseded by the single W1 app, but they cannot simply be deleted because external consumers may still reference them; they require a proper obsoletion window first.

Solution: Marked all country-specific Expense Agent demo data as obsolete (~101 files). Each codeunit is wrapped in #if not CLEAN29 / #endif so it compiles out under the CLEAN29 flag, and annotated with ObsoleteState = Pending, ObsoleteTag = '29.0', and ObsoleteReason = 'The country-specific Expense Agent demo data is being consolidated into a single app in W1 and will be removed in a future release.', with #pragma warning disable AL0432 where they reference other now-obsolete objects. Behavior is unchanged for non-CLEAN29 builds — the objects stay functional through the deprecation window and are excluded under CLEAN29, ready for full removal in a future release.