[test] Remove node/v8 memory64 flags. NFC

[sbc100]

In the latest versions of node and v8 memory64 is not longer experimental.

In the older versions, the experimental memory64 support is not compatible with the latest emscripten-generated memory64 modules (e.g. table64 is completely missing).

[dschuff]

Maybe we should also update the footnote for memory64 on https://webassembly.org/features/
Is there a pre-release build of node that has the feature enabled that we can note? Or one where the flag exposes the up-to-date feature?

[sbc100]

Maybe we should also update the footnote for memory64 on https://webassembly.org/features/ Is there a pre-release build of node that has the feature enabled that we can note? Or one where the flag exposes the up-to-date feature?

Sadly not. Only node-canary is supported and it doesn't need/use the flag.

[dschuff]

I can write something to that effect. Do you have any idea how recent the v8-canary needs to be, or how recent the V8 version needs to be for this to work?

[sbc100]

I can write something to that effect. Do you have any idea how recent the v8-canary needs to be, or how recent the V8 version needs to be for this to work?

Not really. The first version of node canary that we tested with full wasm64 support was 24.0.0-v8-canary202411045365c9d9be (#22832).

For v8 I guess we should just go with the first version that supported memory64 un-flagged, which looks like 133: https://chromestatus.com/feature/5070065734516736