fix(ext/node): expose internal/net as requireable module - #34152

)

## Summary

Several Node.js test cases rely on `require('internal/net')` to reach
the
internal symbols (`kReinitializeHandle`, `kSetNoDelay`, `kSetKeepAlive`,
`kSetKeepAliveInitialDelay`, etc.). Before this change the require threw
`Cannot find module 'internal/net'`, because the module was loaded as a
script for internal use but never registered in the `require()`
resolver.

The module itself is already implemented and used by `node:net`,
`node:dns`, `internal/blocklist`, etc. — this PR exposes it under the
`internal/` path Node tests use directly and shares the `kSet*` symbols
between `internal/net` and `net.ts`.

## Changes

- `ext/node/polyfills/01_require.js`: bind the existing
  `core.loadExtScript("ext:deno_node/internal/net.ts")` result and add
  `"internal/net": internalNet` to `nativeModuleExports`.
- `ext/node/polyfills/internal/net.ts`: add `kSetNoDelay`,
  `kSetKeepAlive`, and `kSetKeepAliveInitialDelay` symbols (previously
  defined privately in `net.ts`) so they share identity reachable from
  `require('internal/net')`.
- `ext/node/polyfills/net.ts`: consume the symbols from
`internal/net.ts`
  instead of redefining them, propagate `keepAlive`/`noDelay` options
from `Socket.prototype.connect` to `setKeepAlive`/`setNoDelay` (matches
  Node), and record the requested state in `kSet*` symbols even when the
  underlying handle does not expose native `setNoDelay`/`setKeepAlive`
  (so socket state reflects user intent regardless of native support).
- `tests/node_compat/config.jsonc`: enable the two newly-passing tests.

## Affected tests

Tests that previously failed with `Cannot find module 'internal/net'`
and now pass:

- \`parallel/test-tls-reinitialize-listeners.js\`
- \`parallel/test-tls-connect-keepalive-nodelay.js\`

Closes denoland/orchid#115

> Note: supersedes denoland#34143, which had a stale title from a previous
> orchid run on the same `orch/issue-115` branch and was being
> contested by automated reverts.

## Test plan

- [x] \`cargo build --bin deno -p deno\`
- [x] \`./tools/format.js --js\`
- [x] \`cargo test --test node_compat test-tls-reinitialize-listeners\`
— passes
- [x] \`cargo test --test node_compat
test-tls-connect-keepalive-nodelay\` — passes
- [x] \`cargo test --test node_compat test-net-persistent-nodelay\` —
still passes (no regression)
- [x] \`cargo test --test node_compat test-tls-net-socket-keepalive\` —
still passes (no regression)

Co-authored-by: divybot <[email protected]>
Co-authored-by: Divy Srivastava <[email protected]>