`Process`: revert `#interruptWith:` Commit 3b02b0f1f647: Cherry-picked `Semaphore`, `EventSemaphore, `Process` and `ProcessorScheduler` changes `Process >> #interruptWith:` but this - for not yet known reason - breaks stx:libjava tests. This commit reverts the code to version before that commit, fixing tests.

.svnversion
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