[ASP.NET Core] TabStrip rendering mismatch compared to the source of truth

[NickIliev]

Bug report

The Tabstrip component is rendered with missing CSS selectors compared to the source of truth tests. That results in ThemeBuilder producing styles incompatible with the UI for ASP.NET Core implementation

Reproduction of the problem

1. Load the TabStrip demo for UI for ASP.NET Core https://demos.telerik.com/aspnet-core/tabstrip
2. Add custom styles as generated from ThemeBuilder (Kendo Bootstrap theme) or compare the rendering in the demo app with the rendering from the source of truth tests: https://github.com/telerik/kendo-themes/blob/develop/tests/tabstrip/tabstrip.html#L17-L1

Current behavior

The rendering for the TabStrip in the ASP.NET Core app is missing the following classes:
k-tabstrip-item
k-tabstrip-items-start

Expected/desired behavior

The Tabstrip to render the missing classes so that the custom themes from ThemeBuilder would be compatible

Environment

• Kendo UI version: Q4 2024
  reported through t.1673045