Fix Bazel 9 compatibility: add explicit load() for cc_* rules

Bazel 9 removed native cc_library, cc_test, and cc_binary rules from
the global scope. They now require explicit load() statements from
@rules_cc.

- Add load("@rules_cc//cc:cc_library.bzl", "cc_library") to BUILD files
- Add load("@rules_cc//cc:cc_test.bzl", "cc_test") to BUILD files
- Update build_defs.bzl macros to use loaded cc_test instead of
  native.cc_test

Author: AaronWebster

compiler/back_end/cpp/build_defs.bzl

@@ -16,28 +16,29 @@
 # vim:set ft=blazebuild:
 """Rule to generate cc_tests with and without system-specific optimizations."""
 
+load("@rules_cc//cc:cc_test.bzl", "cc_test")
 load("@rules_python//python:py_test.bzl", "py_test")
 
 def emboss_cc_test(name, copts = None, no_w_sign_compare = False, **kwargs):
     """Generates cc_test rules with and without -DEMBOSS_NO_OPTIMIZATIONS."""
-    native.cc_test(
+    cc_test(
         name = name,
         copts = copts or [],
         **kwargs
     )
-    native.cc_test(
+    cc_test(
         name = name + "_no_opts",
         copts = [
             "-DEMBOSS_NO_OPTIMIZATIONS",
         ] + ([] if no_w_sign_compare else ["-Wsign-compare"]) + (copts or []),
         **kwargs
     )
-    native.cc_test(
+    cc_test(
         name = name + "_no_checks",
         copts = ["-DEMBOSS_SKIP_CHECKS"] + (copts or []),
         **kwargs
     )
-    native.cc_test(
+    cc_test(
         name = name + "_no_checks_no_opts",
         copts = [
             "-DEMBOSS_NO_OPTIMIZATIONS",

integration/googletest/BUILD

@@ -12,6 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+load("@rules_cc//cc:cc_library.bzl", "cc_library")
+load("@rules_cc//cc:cc_test.bzl", "cc_test")
+
 cc_library(
     name = "emboss_test_util",
     testonly = 1,

runtime/cpp/BUILD

@@ -14,6 +14,8 @@
 
 # Emboss C++ Runtime.
 
+load("@rules_cc//cc:cc_library.bzl", "cc_library")
+
 filegroup(
     name = "raw_headers",
     srcs = [

runtime/cpp/test/BUILD

@@ -14,6 +14,7 @@
 
 # Emboss public definitions.
 
+load("@rules_cc//cc:cc_test.bzl", "cc_test")
 load(
     ":build_defs.bzl",
     "emboss_cc_util_test",

runtime/cpp/test/build_defs.bzl

@@ -17,14 +17,16 @@
 
 """Macro to run tests both with and without optimizations."""
 
+load("@rules_cc//cc:cc_test.bzl", "cc_test")
+
 def emboss_cc_util_test(name, copts = [], **kwargs):
     """Constructs two cc_test targets, with and without optimizations."""
-    native.cc_test(
+    cc_test(
         name = name,
         copts = copts + ["-Wsign-compare"],
         **kwargs
     )
-    native.cc_test(
+    cc_test(
         name = name + "_no_opts",
         copts = copts + [
             # This is generally a dangerous flag for an individual target, but