[VL] Isolate /usr/local from native builds on macOS

[jackylee-ch]

What changes are proposed in this pull request?

On Homebrew-based macOS, /usr/local accumulates leftover headers,
libraries, and CMake packages from prior Velox/Gluten builds (often
root-owned after past sudo make install runs from cmake_install
in the bootstrap). When the native build includes /usr/local/include
and /usr/local/lib/cmake in its CMake search paths it picks up stale
or mismatched versions of re2, glog, fmt, etc., shadowing Velox's
deps-install copies and producing confusing link or compile errors.

Concrete failure modes that show up before this fix:

• Fresh build picks up /usr/local/lib/cmake/glog from a prior
  cmake --install and links a stale glog into libvelox.dylib
  alongside the bundled glog from deps-install.
• /usr/local/include shadows Cellar headers (e.g. fmt) and yields
  static_assert failures because Velox's bundled fmt advanced past
  what /usr/local/include/fmt provides.
• Link errors against an old re2 left over from an aborted Velox
  bootstrap.

This PR forces CMake to ignore /usr/local when building native deps
on macOS, in three places that drive the third-party / Velox / Gluten
CMake configures:

File / Function	Change
dev/build-helper-functions.sh::cmake_install	adds -DCMAKE_NO_SYSTEM_FROM_IMPORTED=ON, -DCMAKE_IGNORE_PREFIX_PATH=/usr/local, -DCMAKE_IGNORE_PATH, -DCMAKE_SYSTEM_IGNORE_PATH for the third-party CMake invocations driven by the Arrow/Velox bootstrap
ep/build-velox/src/build-velox.sh::compile	same flags when configuring Velox itself, plus suppresses two Apple-Clang-only warnings that fire under -Werror on macOS but are benign noise: -Wno-inconsistent-missing-override and -Wno-macro-redefined
dev/builddeps-veloxbe.sh::build_gluten_cpp	same isolation flags plus the same warning suppressions for the Gluten CMake configure

All blocks are gated on [[ "$(uname)" == "Darwin" ]] / if [ $OS == 'Darwin' ]. Linux build/link semantics are unchanged.

Without this isolation, the macOS native build is non-deterministic
depending on what's left over in /usr/local; with it, the build only
reads from the well-defined Homebrew Cellar prefix (/opt/homebrew)
and Velox's deps-install.

How was this patch tested?

• macOS 14 arm64 with Apple Clang 17 and a /usr/local populated
  with stale glog/re2/fmt installs from a prior session: with these
  flags applied, the build no longer references /usr/local/include
  or /usr/local/lib in any compile or link command (verified via
  _build/release/build.ninja), and produces clean libvelox.dylib
  • libgluten.dylib that pass the Gluten CPP ctest matrix.
• Spark 3.5 + Velox backend Java JNI canary suites
  (VeloxBloomFilterTest, ColumnarBatchTest, VeloxListenerApiTest,
  OnHeapFileSystemTest, ArrowColumnVectorTest) all pass on the
  resulting build.
• Linux x86_64 Ubuntu 22.04 build green; all isolation blocks are
  Darwin-gated. Local Ubuntu build verified clean.

Was this patch authored or co-authored using generative AI tooling?

co-auth: Claude (Sonnet/Opus) via Claude Code 1.x