fix(macos): fix race condition in wkwebview implementation of cookie fetching

[charrondev]

As I was implementing tauri-apps/tauri#12665 I noticed a completed hang of the application if cookies_for_url() was called multiple times in quick succession.

I'm no expect in rust or objc but my understanding of the code here is as follows:

• WKHTTPCookieStore.getAllCookies() takes a callback to receive the cookies.
• The interface we expose for fetching cookies is synchronous, so we need to loop and block for some period of time until we receive our results.
• Looping purely in rust won't actually do the work properly, since the objc runloop (running on another thread? (potentially?) needs to be told to progress.
• runUntilDate() didn't necessarily block until that date on the rust site of this operation.

In order to fix this I had to do a few things. Notably I had to do all of these things for the issue to go away consistently.

• Replace runUntilDate() with acceptInputForMode_beforeDate().
• Add some waiting in rust with by using recv_timeout() instead of try_recv

Now I'm sure there's something nasty under the hood causing this to happen, but I'm not really knowledgable enough to dive any deeper myself. I will say these changes fix the issue I was running into at the cost of an extra ms on my end.

[github-actions]

Package Changes Through 4037f7e

There are 1 changes which include wry with patch

Planned Package Versions

The following package releases are the planned based on the context of changes in this pull request.

package	current	next
wry	0.50.1	0.50.2

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