Move prebuilt_sepolicy_cts_data to system/sepolicy

This is a no-op now but it will make vintf finalization easier because
we'll only need system/sepolicy changes.

Bug: 337978860
Test: atest CtsSecurityHostTestCases
Change-Id: I242dcad7511e7c880b1e5434ba3de622f56bc1b3

tests/Android.bp

@@ -179,3 +179,10 @@ python_test_host {
         },
     },
 }
+
+// prebuilt files to be included to CTS
+filegroup {
+    name: "prebuilt_sepolicy_cts_data",
+    srcs: [":202404_sepolicy_cts_data"],
+    visibility: ["//cts/hostsidetests/security"],
+}