fix(ext/node): single source of truth for emulated Node version (#35273)
`process.version` / `process.versions.node` were hard coded as string
literals in the `node:process` polyfill, with no value the rest of the
runtime could reference, so the reported Node version had to be kept in
sync by hand whenever it was bumped.
This defines the emulated Node version once as `NODE_VERSION` in
`ext/node/lib.rs`, and has the polyfill carry a `__NODE_VERSION__` token
that is substituted with that constant at snapshot build time (in
`maybe_transpile_source`). The substitution runs for both the snapshot
build and any non-snapshot runtime, and `_process/process.ts` is a lazy-loaded
script that passes through the transpiler, so the baked value is correct
everywhere. Rust code can now read the same constant directly instead of
duplicating the literal, so the reported version can no longer drift.
`napi_get_node_version`, exposed to native addons through the Node-API C
ABI, previously returned a hard coded `20.11.1` that was unrelated to
and far behind the emulated version. It now derives its major/minor/patch from
the same `NODE_VERSION` constant at compile time, so addons calling it
observe the same version as `process.versions.node`. The napi test asserts the
two agree.
deno
82e8ca0d - fix(ext/node): single source of truth for emulated Node version (#35273)
