Web子系统JS API变更

OpenHarmony 3.2 Beta2版本相较于OpenHarmony 3.2 Beta1版本，Web子系统的API变更如下:

接口变更

模块名	类名	函数	变更类型
ohos.web	WebDataBase	static saveHttpAuthCredentials(host: string, realm: string, username: string, password: string): void;	新增
ohos.web	WebDataBase	static getHttpAuthCredentials(host: string, realm: string): Array<string>;	新增
ohos.web	WebDataBase	static deleteHttpAuthCredentials(): void;	新增
ohos.web	WebDataBase	static existHttpAuthCredentials(): boolean;	新增
ohos.web	WebStorage	static getOriginUsage(origin: string): Promise<number> ; static getOriginUsage(origin: string, callback: AsyncCallback<number>): void;	新增
ohos.web	WebStorage	static getOriginQuota(origin: string): Promise<number>; static getOriginQuota(origin: string, callback: AsyncCallback<number>): void;	新增
ohos.web	WebStorage	static getOrigins(): Promise<Array<WebStorageOrigin>>; static getOrigins(callback: AsyncCallback<Array<WebStorageOrigin>>): void;	新增
ohos.web	WebStorage	static deleteOrigin(origin: string): void;	新增
ohos.web	WebStorage	static deleteAllData(): void;	新增
ohos.web	WebStorageOrigin	quota: number;	新增
ohos.web	WebStorageOrigin	usage: number;	新增
ohos.web	WebStorageOrigin	origin: string;	新增
Web	WebAttribute	onInterceptRequest(callback: (event?: { request: WebResourceRequest}) => WebResourceResponse): WebAttribute;	新增
Web	WebAttribute	onHttpAuthRequest(callback: (event?: { handler: HttpAuthHandler, host: string, realm: string }) => boolean): WebAttribute;	新增
Web	WebAttribute	onScaleChange(callback: (event: {oldScale: number, newScale: number}) => void): WebAttribute;	新增
Web	WebAttribute	onResourceLoad(callback: (event: {url: string}) => void): WebAttribute;	新增
Web	WebAttribute	onPrompt(callback: (event?: {url: string, message: string, value: string, result: JsResult }) => boolean): WebAttribute;	新增
Web	WebAttribute	initialScale(percent: number): WebAttribute;	新增
Web	WebController	backOrForward(step: number): void;	新增
Web	WebController	getPageHeight(): number;	新增
Web	WebController	getTitle(): string;	新增
Web	WebController	getDefaultUserAgent(): string;	新增
Web	WebController	getWebId(): number;	新增
Web	WebController	getHitTestValue(): HitTestValue;	新增
Web	WebController	zoomOut(): boolean;	新增
Web	WebController	zoomIn(): boolean;	新增
Web	WebResourceResponse	setResponseCode(code: number);	新增
Web	WebResourceResponse	setResponseHeader(header: Array<Header>);	新增
Web	WebResourceResponse	setReasonMessage(reason: string);	新增
Web	WebResourceResponse	setResponseMimeType(mimeType: string);	新增
Web	WebResourceResponse	setResponseEncoding(encoding: string);	新增
Web	WebResourceResponse	setResponseData(data: string);	新增