Some of the numeric opcodes have a variadic signature, e.g. table.grow
or table.fill, and soon also the bulk memory opcodes because their
consumed types depend on the memory type.

For those opcodes, remove the signature definition from the opcode macro
lists, because using it might result in bugs.

R=thibaudm@chromium.org

Bug: v8:10949, chromium:1281995
Change-Id: I350e75db7197d97a561f8219cedba5fe85b5c9c9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3424494Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78903}