Microsoft Report Viewer Control for ASP.Net Web Forms applications. Contains the assemblies required to use the ASP.Net Web Forms Report Viewer Control.
No packages depend on Microsoft.ReportingServices.ReportViewerControl.WebForms.
See Reporting Services Blog: https://docs.microsoft.com/en-us/sql/reporting-services/application-integration/release-notes-ssrs-application-integration?view=sql-server-ver15