[VL] Include headers from INSTALL_PREFIX as system includes on Mac

[kevinwilfong]

What changes are proposed in this pull request?

#12105 introduced the flag -DCMAKE_NO_SYSTEM_FROM_IMPORTED=ON to Velox builds. This has the unintended side effect of including dependencies' header files as non-system includes which means that warnings in the build are promoted to errors, e.g.

  In file included from t.cc:1:
  In file included from …/deps-install/include/re2/re2.h:220:
  In file included from …/deps-install/include/absl/base/call_once.h:40:
  In file included from …/deps-install/include/absl/base/nullability.h:153:
  In file included from …/deps-install/include/absl/base/internal/nullability_impl.h:22:
  …/deps-install/include/absl/meta/type_traits.h:511:36: error: builtin __is_trivially_relocatable is deprecated; use __builtin_is_cpp_trivially_relocatable instead
  [-Werror,-Wdeprecated-builtins]
    511 |     : std::integral_constant<bool, __is_trivially_relocatable(T)> {};
        |                                    ^
  1 error generated.

To fix this, this PR proposes explicitly including the header files under ${INSTALL_PREFIX}/include from dependencies as system includes, suppressing these errors which we have limited control over.

How was this patch tested?

Executed ./dev/builddeps-veloxbe.sh on a Mac with Clang 21, verified we no longer got errors from warnings in dependencies. Combined with my other recent changes
#12421
#12422
I was able to successfully run ./dev/builddeps-veloxbe.sh on an otherwise fresh checkout.

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

Co-authored with Claude Opus 4.8

Generated-by: Claude Opus 4.8

[zhouyuan]

@kevinwilfong thanks, please check if this fix from @jackylee-ch works
#12331

[kevinwilfong]

Looks like it fixes it, closing this out.