chore(*): Use blazorSupportsVisualChildren for slots to work in blazor.

Author: MayaKirova

src/components/calendar/calendar.ts

@@ -57,6 +57,7 @@ import IgcYearsViewComponent from './years-view/years-view.js';
 export const focusActiveDate = Symbol();
 
 /* blazorIndirectRender */
+/* blazorSupportsVisualChildren */
 /**
  * Represents a calendar that lets users
  * to select a date value in a variety of different ways.

src/components/date-picker/date-picker.ts

@@ -70,6 +70,7 @@ export interface IgcDatePickerComponentEventMap {
 const formats = new Set(['short', 'medium', 'long', 'full']);
 
 /* blazorIndirectRender */
+/* blazorSupportsVisualChildren */
 /**
  * igc-date-picker is a feature rich component used for entering a date through manual text input or
  * choosing date values from a calendar dialog that pops up.