Temporarily disable cctest DisasmPoisonMonomorphicLoadFloat64.

Bug: v8:9820
Change-Id: I3208a7f85aa7ab2c09602107b2f0954f02b15a45
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2326332Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Auto-Submit: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69131}