build: transition from ts-api-guardian to dev-infra api-golden utility

The dev-infra tooling now directly provides public API change testing capabilities that leverage the `api-extractor` utility. These new testing capabilities are shared with framework and components.
`ts-api-guardian` has been removed as a dependency as a result.

Author: clydin

goldens/BUILD.bazel

@@ -0,0 +1,8 @@
+package(default_visibility = ["//visibility:public"])
+
+filegroup(
+    name = "public-api",
+    srcs = glob([
+        "public-api/**/*.md",
+    ]),
+)

goldens/public-api/BUILD.bazel

@@ -0,0 +1,151 @@
+## API Report File for "@angular-devkit/architect"
+
+> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
+
+```ts
+
+import { analytics } from '@angular-devkit/core';
+import { experimental } from '@angular-devkit/core';
+import { json } from '@angular-devkit/core';
+import { logging } from '@angular-devkit/core';
+import { Observable } from 'rxjs';
+import { SubscribableOrPromise } from 'rxjs';
+
+// @public (undocumented)
+export class Architect {
+    constructor(_host: ArchitectHost, registry?: json.schema.SchemaRegistry, additionalJobRegistry?: experimental.jobs.Registry);
+    // (undocumented)
+    has(name: experimental.jobs.JobName): Observable<boolean>;
+    // (undocumented)
+    scheduleBuilder(name: string, options: json.JsonObject, scheduleOptions?: ScheduleOptions): Promise<BuilderRun>;
+    // (undocumented)
+    scheduleTarget(target: Target, overrides?: json.JsonObject, scheduleOptions?: ScheduleOptions): Promise<BuilderRun>;
+}
+
+// @public
+export interface BuilderContext {
+    addTeardown(teardown: () => Promise<void> | void): void;
+    readonly analytics: analytics.Analytics;
+    builder: BuilderInfo;
+    currentDirectory: string;
+    getBuilderNameForTarget(target: Target): Promise<string>;
+    // (undocumented)
+    getProjectMetadata(projectName: string): Promise<json.JsonObject>;
+    // (undocumented)
+    getProjectMetadata(target: Target): Promise<json.JsonObject>;
+    getTargetOptions(target: Target): Promise<json.JsonObject>;
+    id: number;
+    logger: logging.LoggerApi;
+    reportProgress(current: number, total?: number, status?: string): void;
+    reportRunning(): void;
+    reportStatus(status: string): void;
+    scheduleBuilder(builderName: string, options?: json.JsonObject, scheduleOptions?: ScheduleOptions_2): Promise<BuilderRun>;
+    scheduleTarget(target: Target, overrides?: json.JsonObject, scheduleOptions?: ScheduleOptions_2): Promise<BuilderRun>;
+    target?: Target;
+    validateOptions<T extends json.JsonObject = json.JsonObject>(options: json.JsonObject, builderName: string): Promise<T>;
+    workspaceRoot: string;
+}
+
+// @public
+export interface BuilderHandlerFn<A> {
+    (input: A, context: BuilderContext): BuilderOutputLike;
+}
+
+// @public
+export type BuilderInfo = json.JsonObject & {
+    builderName: string;
+    description: string;
+    optionSchema: json.schema.JsonSchema;
+};
+
+// @public
+export type BuilderInput = json.JsonObject & Schema;
+
+// @public (undocumented)
+export type BuilderOutput = json.JsonObject & Schema_2;
+
+// @public
+export type BuilderOutputLike = AsyncIterable<BuilderOutput> | SubscribableOrPromise<BuilderOutput> | BuilderOutput;
+
+// @public (undocumented)
+export type BuilderProgress = json.JsonObject & Schema_3 & TypedBuilderProgress;
+
+// @public
+export type BuilderProgressReport = BuilderProgress & {
+    target?: Target;
+    builder: BuilderInfo;
+};
+
+// @public (undocumented)
+export enum BuilderProgressState {
+    // (undocumented)
+    Error = "error",
+    // (undocumented)
+    Running = "running",
+    // (undocumented)
+    Stopped = "stopped",
+    // (undocumented)
+    Waiting = "waiting"
+}
+
+// @public (undocumented)
+export type BuilderRegistry = experimental.jobs.Registry<json.JsonObject, BuilderInput, BuilderOutput>;
+
+// @public
+export interface BuilderRun {
+    id: number;
+    info: BuilderInfo;
+    output: Observable<BuilderOutput>;
+    progress: Observable<BuilderProgressReport>;
+    result: Promise<BuilderOutput>;
+    stop(): Promise<void>;
+}
+
+// @public (undocumented)
+export function createBuilder<OptT = json.JsonObject, OutT extends BuilderOutput = BuilderOutput>(fn: BuilderHandlerFn<OptT>): Builder<OptT & json.JsonObject>;
+
+// @public (undocumented)
+export function fromAsyncIterable<T>(iterable: AsyncIterable<T>): Observable<T>;
+
+// @public (undocumented)
+export function isBuilderOutput(obj: any): obj is BuilderOutput;
+
+// @public (undocumented)
+export interface ScheduleOptions {
+    // (undocumented)
+    analytics?: analytics.Analytics;
+    // (undocumented)
+    logger?: logging.Logger;
+}
+
+// @public
+export function scheduleTargetAndForget(context: BuilderContext, target: Target, overrides?: json.JsonObject, scheduleOptions?: ScheduleOptions_2): Observable<BuilderOutput>;
+
+// @public (undocumented)
+export type Target = json.JsonObject & Target_2;
+
+// @public
+export function targetFromTargetString(str: string): Target;
+
+// @public
+export function targetStringFromTarget({ project, target, configuration }: Target): string;
+
+// @public
+export type TypedBuilderProgress = {
+    state: BuilderProgressState.Stopped;
+} | {
+    state: BuilderProgressState.Error;
+    error: json.JsonValue;
+} | {
+    state: BuilderProgressState.Waiting;
+    status?: string;
+} | {
+    state: BuilderProgressState.Running;
+    status?: string;
+    current: number;
+    total?: number;
+};
+
+// (No @packageDocumentation comment for this package)
+
+```