GH-36686: [C++] Pass CMAKE_OSX_SYSROOT to external projects (#36706)

### Rationale for this change

If we use different macOS SDK in Apache Arrow C++ and bundled projects, it will cause some problems such as a build error.

### What changes are included in this PR?

Pass `CMAKE_OSX_SYSROOT` explicitly to external projects.

### Are these changes tested?

Yes.

### Are there any user-facing changes?

Yes.
* Closes: #36686

Authored-by: Sutou Kouhei <[email protected]>
Signed-off-by: Dewey Dunnington <[email protected]>

Author: kou

cpp/cmake_modules/ThirdpartyToolchain.cmake

@@ -916,6 +916,7 @@ set(EP_COMMON_CMAKE_ARGS
     -DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=${CMAKE_EXPORT_NO_PACKAGE_REGISTRY}
     -DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=${CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY}
     -DCMAKE_INSTALL_LIBDIR=lib
+    -DCMAKE_OSX_SYSROOT=${CMAKE_OSX_SYSROOT}
     -DCMAKE_VERBOSE_MAKEFILE=${CMAKE_VERBOSE_MAKEFILE})
 
 # Enable s/ccache if set by parent.

dev/tasks/macros.jinja

@@ -238,13 +238,14 @@ on:
       cp ../dev/tasks/homebrew-formulae/autobrew/apache-arrow*.rb tools/
 
       # Pin the git commit in the formula to match
-      cd tools
+      pushd tools
       if [ "{{ is_fork }}" == "true" ]; then
-        sed -i.bak -E -e 's/apache\/arrow.git"$/{{ arrow.github_repo.split("/") | join("\/") }}.git", :revision => "'"{{ arrow.head }}"'"/' apache-arrow*.rb
+        sed -i.bak -E -e 's/apache\/arrow.git", branch: "main"$/{{ arrow.github_repo.split("/") | join("\/") }}.git", :revision => "'"{{ arrow.head }}"'"/' apache-arrow*.rb
       else
-        sed -i.bak -E -e 's/arrow.git"$/arrow.git", :revision => "'"{{ arrow.head }}"'"/' apache-arrow*.rb
+        sed -i.bak -E -e 's/arrow.git", branch: "main"$/arrow.git", :revision => "'"{{ arrow.head }}"'"/' apache-arrow*.rb
       fi
       rm -f apache-arrow*.rb.bak
+      popd
 {% endmacro %}
 
 {%- macro github_change_r_pkg_version(is_fork, version) -%}