The native module cache makes it difficult to test deserialization,
because the native module just gets loaded from the cache instead of
deserializing the serialized module. This CL adds a new flag,
--wasm-native-module-cache-enabled, to control whether the native module
cache is enabled or not. The cache gets disabled by handling all modules
like asm.js modules when the cache gets disabled, as the cache is not
used for asm.js.

The name of the flag is positive (i.e.
`enabled` instead of `disabled`) to avoid double negation. The flag is
true by default, and set to false in tests.

R=thibaudm@chromium.org
CC=clemensb@chromium.org

Bug: v8:12964
Change-Id: If2b96a95ccf37f2eb8a868ad1661c3325c1048f6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3703836
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81132}