build: update ts-api-guardian jsdoc tag requirements (#26595)

Now `@experimental` tags are banned; and `@publicApi`
tags are required on exports.

PR Close #26595

tools/ts-api-guardian/test/fixtures/sorting.d.ts

@@ -1,11 +1,17 @@
+/** @publicApi */
 export declare type E = string;
+/** @publicApi */
 export interface D {
     e: number;
 }
+/** @publicApi */
 export declare var e: C;
+/** @publicApi */
 export declare class C {
     e: number;
     d: string;
 }
+/** @publicApi */
 export declare function b(): boolean;
+/** @publicApi */
 export declare const a: string;