ci: bind gnd-binary-build workflow inputs via env before shell

[SashaMIT]

Summary

• Bind inputs.release_tag (with github.ref_name fallback) through env: before release upload/download/version shell steps.
• Bind related matrix/step values and inputs.dry_run through env: before extract/package/publish shell steps.
• Same class as GitHub’s documented script-injection guidance for interpolating workflow inputs into run: scripts.

Test plan

• Tag/release upload still publishes the expected gnd artifacts
• npm platform packages and wrapper still resolve version/tag correctly
• dry_run still adds --dry-run to npm publish when set

Made with Cursor