do not track 'raise Defect' in the .raises: [] clause anymore (#14298)

* do not track 'raise Defect' in the .raises: [] clause anymore

* --panics:on maps 'raise Defect' to an unrecoverable fatal error

* make tests green again

* update the documentation too

lib/system/excpt.nim

@@ -406,7 +406,7 @@ proc reportUnhandledError(e: ref Exception) {.nodestroy.} =
   when hostOS != "any":
     reportUnhandledErrorAux(e)
   else:
-    discard()
+    discard ()
 
 proc nimLeaveFinally() {.compilerRtl.} =
   when defined(cpp) and not defined(noCppExceptions) and not gotoBasedExceptions:
@@ -434,6 +434,11 @@ when gotoBasedExceptions:
       quit(1)
 
 proc raiseExceptionAux(e: sink(ref Exception)) {.nodestroy.} =
+  when defined(nimPanics):
+    if e of Defect:
+      reportUnhandledError(e)
+      quit(1)
+
   if localRaiseHook != nil:
     if not localRaiseHook(e): return
   if globalRaiseHook != nil: