Added --trace-wasm flag which prints function entry in wasm.

R=clemensb@chromium.org

Bug: v8:10559
Change-Id: I049efeadb0149f4f58ce34a29fd53fbf5688bd4b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2215052
Commit-Queue: Arnaud Robin <arobin@google.com>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67998}