Add googletest Bazel dep

.bazelignore

@@ -1,5 +1,5 @@
-# The vendored instance of googletest v1.11.0 is not supported by current Bazel version.
-# It will cause errors in Bazel if not ignored
-# A fixed version exists on the central Bazel registry that can be used on the Bazel side:
-# https://registry.bazel.build/modules/googletest/1.11.0
+# The vendored googletest contains BUILD.bazel files referencing @rules_python and
+# @com_google_absl, which are not in this Bzlmod graph. Without this entry,
+# bazel query //... crawls into the directory and fails. The module is exposed to
+# Bazel via local_path_override in MODULE.bazel instead.
 libs/3rdparty/googletest

MODULE.bazel

@@ -19,6 +19,11 @@ bazel_dep(name = "bazel_skylib", version = "1.9.0")
 
 bazel_dep(name = "buildifier_prebuilt", version = "8.5.1.1", dev_dependency = True)
 
+local_path_override(
+    module_name = "googletest",
+    path = "libs/3rdparty/googletest",
+)
+
 register_toolchains(
     "//bazel/toolchain:cc_toolchain_arm_none_eabi_gcc",
 )

libs/3rdparty/googletest/MODULE.bazel

@@ -0,0 +1,9 @@
+module(
+    name = "googletest",
+    version = "1.12.1",
+    compatibility_level = 1,
+)
+
+bazel_dep(name = "abseil-cpp", version = "20210324.2", repo_name = "com_google_absl")
+bazel_dep(name = "platforms", version = "0.0.5")
+bazel_dep(name = "rules_cc", version = "0.0.1")