fix(core): temporarily remove @deprecated jsdoc tag for a TextBed.get overload (#30514)

PR #29290 introduced a new `TestBed.get` signature and deprecated the existing one.
This raises a lot of TSLint deprecation warnings in projects using a strict TS config (see #29905 for context), so we are temporarily removing the `@deprecated` annotation in favor of a plain text warning until we properly fix it.

Refs #29905
Fixes FW-1336

PR Close #30514

packages/core/testing/src/test_bed.ts

@@ -57,8 +57,14 @@ export interface TestBed {
   compileComponents(): Promise<any>;
 
   get<T>(token: Type<T>|InjectionToken<T>, notFoundValue?: T, flags?: InjectFlags): any;
+
+  // TODO: switch back to official deprecation marker once TSLint issue is resolved
+  // https://github.com/palantir/tslint/issues/4522
   /**
-   * @deprecated from v8.0.0 use Type<T> or InjectionToken<T>
+   * deprecated from v8.0.0 use Type<T> or InjectionToken<T>
+   * This does not use the deprecated jsdoc tag on purpose
+   * because it renders all overloads as deprecated in TSLint
+   * due to https://github.com/palantir/tslint/issues/4522.
    */
   get(token: any, notFoundValue?: any): any;