Reland and fix "Add support for keyed-call on arrays of fast elements"

test/mjsunit/regress/clear-keyed-call.js

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-// Loop to force OSR.
-var j = 0;
-for (var i = 0; i < 80000; i++) {
-    j++;
+// Flags: --expose-gc --allow-natives-syntax
+
+function f(a) {
+  a[0](1);
 }
 
-function SarShr(val) {
-  return val >> (-2 >>> 0);
-}
-
-var K3 = 0x80000000;
-assertEquals(-2, SarShr(K3 | 0));
+f([function(a) { return a; }]);
+f([function(a) { return a; }]);
+f([function(a) { return a; }]);
+%NotifyContextDisposed();
+gc();
+gc();
+gc();