Moving some bytes and array tests to semanticTests

test/libsolidity/semanticTests/array/fixed_array_cleanup.sol

@@ -0,0 +1,17 @@
+contract c {
+    uint spacer1;
+    uint spacer2;
+    uint[20] data;
+    function fill() public {
+        for (uint i = 0; i < data.length; ++i) data[i] = i+1;
+    }
+    function clear() public { delete data; }
+}
+// ====
+// compileViaYul: also
+// ----
+// storage: empty
+// fill() ->
+// storage: nonempty
+// clear() ->
+// storage: empty