Fix linting. Add reference to GitHub issue

Signed-off-by: Dom Del Nano <ddelnano@gmail.com>
(cherry picked from commit 44c8b38)

Author: ddelnano

src/vizier/services/agent/shared/manager/BUILD.bazel

@@ -86,14 +86,15 @@ pl_cc_test(
 
 pl_cc_test(
     name = "heartbeat_test",
+    # TODO(ddelnano): Remove the moderate timeout once flakiness is resolved (gh#2295)
+    timeout = "moderate",
     srcs = ["heartbeat_test.cc"],
     deps = [
         ":cc_library",
         ":test_utils",
         "//src/common/event:cc_library",
         "//src/common/testing/event:cc_library",
     ],
-    timeout = "moderate",
 )
 
 pl_cc_test(
@@ -119,12 +120,13 @@ pl_cc_test(
 
 pl_cc_test(
     name = "registration_test",
+    # TODO(ddelnano): Remove the moderate timeout once flakiness is resolved (gh#2295)
+    timeout = "moderate",
     srcs = ["registration_test.cc"],
     deps = [
         ":cc_library",
         ":test_utils",
         "//src/common/event:cc_library",
         "//src/common/testing/event:cc_library",
     ],
-    timeout = "moderate",
 )