Currently, only one memory is supported.

For memory, we would use name as follows.
1. If import: use <import_module>.<field_name> from WasmImport.
2. If export: use <field_name> from WasmExport.
3. Use memory<index>.

Doc: https://docs.google.com/document/d/1XoXWONLBgZWQ9dhtoMpQPvD0fnnWA50OorsuSXfME3g
Bug: v8:10242
Change-Id: Ifd342bcd86ac302f5b43f2ee88a8ea21a28b5a0f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2132724
Commit-Queue: Z Nguyen-Huu <duongn@microsoft.com>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Kim-Anh Tran <kimanh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67020}