fix: add setuptools and wheel to default sdist build dependencies

[xangcastle]

Projects using setuptools.build_meta as their sdist build backend require both setuptools and wheel to be available during the PEP 517 build, but the default_build_dependencies list only shipped build, causing silent failures for any project that didn't explicitly override the list. This adds setuptools and wheel to the default, covering the overwhelmingly common case; the existing uv-sdist-native-build e2e test (python-geohash, a C-extension sdist built with setuptools) now relies on this default instead of an explicit override, so any future regression against these defaults will fail CI directly.

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Changes are visible to end-users: no

Test plan

• Covered by existing test cases

[aspect-workflows]

✨ Aspect Workflows Tasks

📅 Thu Jun 11 12:49:24 UTC 2026

❌ 2 failed tasks

• ❌ test (test-e2e-bazel-8) · ⏱ 34.5s · 🐙 GitHub Actions · ☑️ Check
  💬 failed in test · Bazel test failed
• ❌ test (test-e2e-bazel-9) · ⏱ 23s · 🐙 GitHub Actions · ☑️ Check
  💬 failed in test · Bazel test failed

✅ 5 successful tasks

• ✅ buildifier · ⏱ 20.2s · 🐙 GitHub Actions · ☑️ Check
  💬 Format complete (clean)
• ✅ gazelle · ⏱ 19.1s · 🐙 GitHub Actions · ☑️ Check
  💬 Gazelle complete (clean)
• ✅ test (test-examples-uv_pip_compile-bazel-8) · ⏱ 22.5s · 🐙 GitHub Actions · ☑️ Check
  💬 Bazel test complete (1/1 passed · 1 cached)
• ✅ test (test-root-bazel-8) · ⏱ 36m 33s · 🐙 GitHub Actions · ☑️ Check
  💬 Bazel test complete (123/123 passed)
• ✅ test (test-root-bazel-9) · ⏱ 36m 27s · 🐙 GitHub Actions · ☑️ Check
  💬 Bazel test complete (122/122 passed)

🔁 Reproduce

❌ test (test-e2e-bazel-8 · test-e2e-bazel-9)

aspect test -- //...

# without Aspect CLI
bazel test -- //...

_{Install aspect: docs.aspect.build/cli/install}

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