Use provided transition on cache hit

[PhilipTrauner]

When provided with an URL that ends up being redirected (301), no cache hit occurs during initialization, as URLCache.cachedResponse expects the redirected URL to be provided instead.
This leads to _phase being set to .empty, even though the ensuing .load call will result in a cache hit, because URLSession.data does behave properly.

... that's my theory, at least 😬

I saw, that f24cfe7 did away with animating on cache hit.
What was the reason for that change?

[lorenzofiamingo]

Transaction has to be used when phase changes (also according to official docs).
On cache hit phase should just be initialized to success(Image), ideally. But for some reasons this is not happening (see this). Know I try to rewrite the code avoiding URLCache.cachedResponse usage.

[lorenzofiamingo]

'REQUEST_CHANGES' performed by Xcode.

[lorenzofiamingo]

2977899 fix redirected urls.