[test] Make test work with deopt fuzzer

Bug: v8:10788
Change-Id: Iebc3f8dd892fd0f8123feaf11333eae6832589dc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2342852Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69292}

test/mjsunit/elements-kind.js

@@ -26,6 +26,7 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --allow-natives-syntax --expose-gc --nostress-opt
+// Flags: --deopt-every-n-times=0
 
 var elements_kind = {
   fast_smi_only             :  'fast smi only elements',