perf(cli): drop unused deno_ast bundler feature (#34424)
## Summary
- Removes the unused `bundler` feature from the CLI's `deno_ast`
dependency.
- Drops the resulting unused SWC bundler-related dependencies from the
lockfile.
- Keeps the existing Rolldown-based bundling behavior intact.
## Validation
- Confirmed the removed feature is not required by the CLI bundle path.
- Ran focused bundling checks for the affected CLI behavior.
- Built baseline and candidate release-lite binaries on the same
execution target and compared their sizes directly.
Co-authored-by: Nathan Whitaker <nathan@deno.com>
