build: copy ts-api-guardian sources (#22544)

This is an exact mirror of 750f651eca

PR Close #22544

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

@@ -0,0 +1,11 @@
+export declare type E = string;
+export interface D {
+    e: number;
+}
+export declare var e: C;
+export declare class C {
+    e: number;
+    d: string;
+}
+export declare function b(): boolean;
+export declare const a: string;