We want to be consistent with wasdk/wasmparser.

The names used in V8 should follow the WAT convention and always start
with a dollar, both for names from the "names" section as well as
generated names.

Bug: v8:10242
Change-Id: If4dbd4c38208c9dd9377dd2f79120635a531d881
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2070637
Commit-Queue: Z Nguyen-Huu <duongn@microsoft.com>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Kim-Anh Tran <kimanh@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66434}