[Extensibility Request] Add public wrappers for "Report Layouts Impl." procedures

Describe the issue

Dear BCApps team,

At request of Jesper Schulz-Wedde, this issue has been recreated from the microsoft/BusinessCentralApps repository (see original issue: https://github.com/microsoft/BusinessCentralApps/issues/1818#issuecomment-4768494442)

A pull request was opened earlier by Kilian Seizinger in the microsoft/BCApps repository: https://github.com/microsoft/BusinessCentralApps/pull/1806
Jesper Schulz-Wedde has requested for the PR to be recreated in the microsoft/BusinessCentralApps repository (see original PR: https://github.com/microsoft/BusinessCentralApps/pull/1806#issuecomment-4658707946)

Extensibility Request

Through this issue we would like to request a public codeunit that exposes procedures of the "Report Layouts Impl." codeunit, to avoid code duplication.

Examples of procedures we would like to see exposed:

• RunCustomReport
• EditReportLayout
• ExportReportLayout
• GetFileExtension (with an OnBeforeGetFileExtension event with IsHandled parameter, to better support ISV layout types)
• SetDefaultReportLayoutSelection
• GetReportLayoutSelectionCorrespondingEnum
• AddLayoutSelection

Internal work item: AB#445850

Expected behavior

Enable extensions to use the Base Application's implementation for working with report layouts instead of duplicating code

Steps to reproduce

It is not possible to reuse the implementation of the Report Layouts Impl codeunit, leading to duplication and additional maintenance in other apps/extensions.

Additional context

No response

I will provide a fix for a bug

• I will provide a fix for a bug

Start by locating the "Report Layouts Impl." codeunit and reviewing the listed procedures: RunCustomReport, EditReportLayout, ExportReportLayout, GetFileExtension, SetDefaultReportLayoutSelection, GetReportLayoutSelectionCorrespondingEnum, and AddLayoutSelection. Review the earlier pull request and determine the public wrapper and event surface needed so extensions can reuse the implementation without duplication.