fix(release-image): stamp stdlib/package.json with release version (#23393)

## Summary

The aztec node Docker image was returning `"dev"` from
`getNodeVersion()` in 4.3.0-rc.1. Root cause: PR #22941 switched
`getPackageVersion()` to read the version from
`yarn-project/stdlib/package.json`, but `release-image/Dockerfile` was
only updated to stamp `.release-please-manifest.json` (which the old
implementation consumed). `stdlib/package.json` kept the `0.1.0`
placeholder inside the image, which `getPackageVersion()` substitutes
with `DEV_VERSION` (`"dev"`).

This adds a second stamp step in the Dockerfile that rewrites `.version`
in `yarn-project/stdlib/package.json` using `jq` (already installed in
the release-image base). The existing `.release-please-manifest.json`
stamp is left alone for now since other tooling may still consume it.

Only `stdlib/package.json` needs stamping for the version-reporting bug:
`getPackageVersion()` resolves `../../package.json` from
`stdlib/dest/update-checker/`, so it always reads the stdlib package
regardless of which CLI invokes it (`aztec --version`, `getNodeVersion`,
contract-artifact stamping, etc).

The npm publish path is unaffected — `ci3/deploy_npm` already calls
`ci3/release_prep_package_json` before `npm publish`, so npm consumers
got the correct version all along. The Docker path was the only release
surface that missed the rename.

## Test plan

- [ ] CI release-image build passes with the new `RUN jq …` step.
- [ ] Run the resulting image with `VERSION=4.3.0-rc.X` and confirm
`aztec --version` and a node's `getNodeVersion` RPC both return the
stamped version instead of `"dev"`.

Author: alexghr

release-image/Dockerfile

@@ -18,5 +18,8 @@ WORKDIR "/usr/src/yarn-project"
 # Ensure the correct version shows in aztec --version
 ARG VERSION
 RUN echo '{".": "'$VERSION'"}' > /usr/src/.release-please-manifest.json
+# Stamp the version into stdlib/package.json, which getPackageVersion() reads at runtime.
+RUN jq --arg v "$VERSION" '.version = $v' /usr/src/yarn-project/stdlib/package.json > /tmp/p.json \
+    && mv /tmp/p.json /usr/src/yarn-project/stdlib/package.json
 
 ENTRYPOINT ["node", "--no-warnings", "/usr/src/yarn-project/aztec/dest/bin/index.js"]