node [v24.x][riscv] V8 backport to resolve compile failure

Failure referenced in https://github.com/nodejs/build/issues/4099#issuecomment-3617069521 - the single line fix to deps/v8/src/execution/riscv/simulator-riscv.h is enough to allow the cross-compiled build to pass but it seems cleaner to to pull the full commit across. If any reviewers disagree then I'm happy to cut this down to just the single line.

This will allow us to enable v24.x in the unofficial-builds repository.

Dec 08 '25 11:12 sxa

Review requested:

[ ] @nodejs/security-wg
[ ] @nodejs/v8-update

Dec 08 '25 11:12 nodejs-github-bot

Failed to start CI

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   ✘  Refusing to run CI on potentially unsafe PR

https://github.com/nodejs/node/actions/runs/20026379622

Dec 08 '25 11:12 github-actions[bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/70423/

Dec 08 '25 12:12 nodejs-github-bot

CI: https://ci.nodejs.org/job/node-test-pull-request/70425/

Dec 08 '25 12:12 nodejs-github-bot

Failed to start CI

   ⚠  No approving reviews found
   ✘  Refusing to run CI on potentially unsafe PR

https://github.com/nodejs/node/actions/runs/20029272474

Dec 08 '25 13:12 github-actions[bot]

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=benchmark-ubuntu2204-intel-64,v8test=v8test/6911/

Dec 08 '25 15:12 nodejs-github-bot

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=rhel8-s390x,v8test=v8test/6911/

Dec 08 '25 15:12 nodejs-github-bot

V8 CI: https://ci.nodejs.org/job/node-test-commit-v8-linux/nodes=rhel8-ppc64le,v8test=v8test/6911/

Dec 08 '25 15:12 nodejs-github-bot

CI: https://ci.nodejs.org/job/node-test-pull-request/70433/