Run core integration tests against a Wine-backed Windows executor (#28401)

## Why

We want to exercise a linux app-server against a windows exec-server
without having to repeat every test case. This approach has slight
precedent in the remote docker test setup.

## What

Run the shared `codex-core` integration suite against Windows
exec-server behavior from Linux. This makes cross-OS path and shell
regressions visible while keeping unsupported cases owned by individual
tests.

- Add `local`, `docker`, and `wine-exec` test environment selection with
legacy Docker compatibility.
- Extend `codex_rust_crate` to generate a sharded Wine-exec variant
using a cross-built Windows server and pinned Bazel Wine/PowerShell
runtimes.
- Teach remote-aware helpers about Windows paths and track temporary
incompatibilities with source-local `skip_if_wine_exec!` calls and
follow-up reasons.

.github/workflows/rust-ci-full-nextest-platform.yml

@@ -343,7 +343,9 @@ jobs:
           set -euo pipefail
           export CODEX_TEST_REMOTE_ENV_CONTAINER_NAME="codex-remote-test-env-${{ github.run_id }}-${{ matrix.shard }}"
           source "${GITHUB_WORKSPACE}/scripts/test-remote-env.sh"
+          echo "CODEX_TEST_ENVIRONMENT=${CODEX_TEST_ENVIRONMENT}" >> "$GITHUB_ENV"
           echo "CODEX_TEST_REMOTE_ENV=${CODEX_TEST_REMOTE_ENV}" >> "$GITHUB_ENV"
+          echo "CODEX_TEST_REMOTE_ENV_CONTAINER_NAME=${CODEX_TEST_REMOTE_ENV_CONTAINER_NAME}" >> "$GITHUB_ENV"
           echo "CODEX_TEST_REMOTE_EXEC_SERVER_URL=${CODEX_TEST_REMOTE_EXEC_SERVER_URL}" >> "$GITHUB_ENV"
 
       - name: Download nextest archive
@@ -437,9 +439,9 @@ jobs:
         run: |
           set +e
           if [[ "${STEPS_TEST_OUTCOME}" != "success" ]]; then
-            docker logs "${CODEX_TEST_REMOTE_ENV}" || true
+            docker logs "${CODEX_TEST_REMOTE_ENV_CONTAINER_NAME}" || true
           fi
-          docker rm -f "${CODEX_TEST_REMOTE_ENV}" >/dev/null 2>&1 || true
+          docker rm -f "${CODEX_TEST_REMOTE_ENV_CONTAINER_NAME}" >/dev/null 2>&1 || true
         env:
           STEPS_TEST_OUTCOME: ${{ steps.test.outcome }}