Migrate to macos_arm64 (#3990)

* Migrate to macos_arm64

* Add comment

* Update bazel_testing.go

.bazelci/presubmit.yml

@@ -91,7 +91,7 @@ tasks:
       - "@go_default_sdk//..."
     test_targets:
       - "//..."
-  macos_legacy:
+  macos_arm64:
     shell_commands:
       - tests/core/cgo/generate_imported_dylib.sh
     build_flags:

go/tools/bazel_testing/bazel_testing.go

@@ -179,7 +179,10 @@ func TestMain(m *testing.M, args Args) {
 // hide that this code is executing inside a bazel test.
 func BazelCmd(args ...string) *exec.Cmd {
 	cmd := exec.Command("bazel")
-	cmd.Args = append(cmd.Args, "--nosystem_rc", "--nohome_rc")
+	// --nosystem_rc isn't used here because Bazel may need essential flags set in
+	// system rc to be able to work correctly
+	// See https://github.com/bazelbuild/rules_go/pull/3969#issuecomment-2220405416
+	cmd.Args = append(cmd.Args, "--nohome_rc")
 	cmd.Args = append(cmd.Args, args...)
 	for _, e := range os.Environ() {
 		// Filter environment variables set by the bazel test wrapper script.