OSS build presubmit: Disable 'Rolling Bazel Version' build.

The current rolling bazel version is [Release 7.0.0-pre.20230917.3](https://github.com/bazelbuild/bazel/commit/7a4b5d6af94b20ac0a1f1c7b642b1938ac5bd9df), which is released last Friday and happens to be at the same time when Crubit OSS build for Rolling Bazel Version started failing.

PiperOrigin-RevId: 568659670
Change-Id: Ie0ce66732e2d1abbf48bbdaa7f3a7b23d081a372
diff --git a/.bazelci/presubmit.yml b/.bazelci/presubmit.yml
index 4f0631c..a776e75 100644
--- a/.bazelci/presubmit.yml
+++ b/.bazelci/presubmit.yml
@@ -30,7 +30,8 @@
   ubuntu2004:
     name: Stable Bazel Version With Clang and LLD
     <<: *default_linux_task
-  ubuntu2004_rolling:
-    name: Rolling Bazel Version With Clang and LLD
-    bazel: "rolling"
-    <<: *default_linux_task
+  # TODO(b/302114986): Reenable once fixed.
+  # ubuntu2004_rolling:
+  #   name: Rolling Bazel Version With Clang and LLD
+  #   bazel: "rolling"
+  #   <<: *default_linux_task