Add new DEBUG dict-resizing command to disable the dict resize (#13043)
The test fails here and there: ``` *** [err]: expire scan should skip dictionaries with lot's of empty buckets in tests/unit/expire.tcl scan didn't handle slot skipping logic. ``` There are two case: 1. In the case of passing the test, we use child process to avoid the dict resize, but it can not completely limit it, since in the dictDelete we still have chance to trigger the resize (hit the force radio). The reason why our test passed before is because the expire dict is still in the rehashing process, so the dictDelete, the dictShrinkIfNeeded can not trigger the resize. 2. In the case of failing the test, the expire dict finished the rehashing, so the last dictDelete, the dictShrinkIfNeeded trigger the dict resize since it hit the force radio, so the skipping logic fail. This PR add a new DEBUG command to disbale the dict resize.
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