Fix a `.jar` file in `java_import.runtime_deps`

Wrap it in a separate `java_import` instead. This fixes a java_jars_in_deps_allowlist violation (b/479392897) and doesn't alter the meaning of the test.

PiperOrigin-RevId: 863594466
Change-Id: I77bdb2cabdb7394ab95df452df6437a74b202bba
diff --git a/test/java/common/rules/java_import_tests.bzl b/test/java/common/rules/java_import_tests.bzl
index 7afbc77..35b713d 100644
--- a/test/java/common/rules/java_import_tests.bzl
+++ b/test/java/common/rules/java_import_tests.bzl
@@ -660,9 +660,14 @@
     target_name = name + "/depends_on_runtimedep"
     util.helper_target(
         java_import,
+        name = target_name + "/import_runtime",
+        jars = ["import_runtime.jar"],
+    )
+    util.helper_target(
+        java_import,
         name = target_name + "/import_dep",
         jars = ["import_compile.jar"],
-        runtime_deps = ["import_runtime.jar"],
+        runtime_deps = [target_name + "/import_runtime"],
     )
     util.helper_target(
         java_library,