Add Bazel@HEAD with no bzlmod tests.

.bazelci/presubmit.yml

diff --git a/.bazelci/presubmit.yml b/.bazelci/presubmit.yml
index b416cb8..14a162a 100644
--- a/.bazelci/presubmit.yml
+++ b/.bazelci/presubmit.yml
@@ -21,6 +21,18 @@
     build_targets: *build_targets
   windows:
     build_targets: *build_targets
+  ubuntu2004_head:
+    bazel: last_green
+    platform: ubuntu2004
+    build_targets: *build_targets
+  macos_head:
+    bazel: last_green
+    platform: macos
+    build_targets: *build_targets
+  windows_head:
+    bazel: last_green
+    platform: windows
+    build_targets: *build_targets
   ubuntu2004_bzlmod:
     bazel: last_green
     platform: ubuntu2004