feat(all): add ability to eject from Ionic sanitizer (#20457)

resolves #18277

core/src/components/loading/loading-interface.ts

@@ -1,8 +1,9 @@
+import { IonicSafeString } from '../../';
 import { AnimationBuilder, Mode, SpinnerTypes } from '../../interface';
 
 export interface LoadingOptions {
   spinner?: SpinnerTypes | null;
-  message?: string;
+  message?: string | IonicSafeString;
   cssClass?: string | string[];
   showBackdrop?: boolean;
   duration?: number;