adjust prefix for toError

[yaacovCR]

should encompass thrown errors and encountered abort errors

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[yaacovCR]

This PR emerged from #4258 => but note that comment at #4258 (comment) by @JoviDeCroock notes remaining reservation with respect to the modified prefix.

I have left this PR in draft, because considering the above mentioned reservation, I am not sure if we consider it better than the status quo.

An argument could be made that the status quo is sufficient: although the AbortError is not technically thrown, depending on the implementation, it could have been, as we could have implemented it as a thrown error simply by using abortSignal.throwIfAborted() => we chose instead to directly access abortSignal.aborted and abortSignal.reason directly, for performance reasons on some runtimes, but semantically, the abortSignal is a "throwable" value.

This PR is also another breaking change, technically, although hopefully it doesn't hit too many people, as since I do not like our current state of error wrapping at all, see discussion at

• Added rawOriginalError to GraphQLError. This will allow errors to sur… #3379

[yaacovCR]

Closing this for now, we can always reopen if desired.