Re-shard focus_test.sh due to timeout.

PiperOrigin-RevId: 625576080
Change-Id: I73d13735af9e6196a21f558117296ed58ee487de
diff --git a/src/test/shell/integration/BUILD b/src/test/shell/integration/BUILD
index e579290..c908806 100644
--- a/src/test/shell/integration/BUILD
+++ b/src/test/shell/integration/BUILD
@@ -938,6 +938,7 @@
         ":test-deps",
         "@bazel_tools//tools/bash/runfiles",
     ],
+    shard_count = 3,
 )
 
 sh_test(