fix(http): move destructuring inside {Request,Response}Options ctor

Previously the RequestOptions/ResponseOptions classes had constructors
with a destructured argument hash (represented by the
{Request,Response}OptionsArgs type). This type consists entirely of
optional members.

This produces a .d.ts file which includes the constructor declaration:

constructor({param, otherParam}?: OptionsArgs);

However, this declaration doesn't type-check properly. TypeScript
determines the actual type of the hash parameter to be OptionsArgs | undefined,
which it then concludes does not have a `param` or `otherParam` member.

This is a bug in TypeScript ( https://github.com/microsoft/typescript/issues/10078 ).
As a workaround, destructuring is moved inside the method, where it does not produce
broken artifacts in the .d.ts.

Fixes #16663.

tools/public_api_guard/http/http.d.ts

@@ -144,7 +144,7 @@ export declare class RequestOptions {
     /** @deprecated */ search: URLSearchParams;
     url: string | null;
     withCredentials: boolean | null;
-    constructor({method, headers, body, url, search, params, withCredentials, responseType}?: RequestOptionsArgs);
+    constructor(opts?: RequestOptionsArgs);
     merge(options?: RequestOptionsArgs): RequestOptions;
 }
 
@@ -192,7 +192,7 @@ export declare class ResponseOptions {
     headers: Headers | null;
     status: number | null;
     url: string | null;
-    constructor({body, status, headers, statusText, type, url}?: ResponseOptionsArgs);
+    constructor(opts?: ResponseOptionsArgs);
     merge(options?: ResponseOptionsArgs): ResponseOptions;
 }