Kotlin: tweak plugin test

Put less emphasis on plugin build isolation, to get a better DevEx out
of it. The crux of the test is the database extraction part, not the
plugin build.

Author: redsun82

java/ql/integration-tests/kotlin/linux/custom_plugin/plugin/BUILD.bazel

@@ -17,7 +17,10 @@ kt_jvm_library(
     srcs = ["Plugin.kt"],
     kotlinc_opts = ":kotlinc-options",
     module_name = "test",
-    resource_strip_prefix = "%s/resources" % package_name(),
+    resource_strip_prefix = "../%s/%s/resources" % (
+        repo_name(),
+        package_name(),
+    ),
     resources = glob(["resources/**"]),
     deps = [
         "@kotlin-compiler-%s" % _version,

java/ql/integration-tests/kotlin/linux/custom_plugin/test.py

@@ -10,20 +10,14 @@ def test(codeql, java_full, cwd, semmle_code_dir, test_dir):
     commands.run(
         [
             f"{semmle_code_dir}/tools/bazel",
-            f"--output_user_root={build_dir}",
             "--max_idle_secs=1",
             "build",
-            "//java/ql/integration-tests/kotlin/linux/custom_plugin/plugin",
-            "--spawn_strategy=local",
-            "--nouse_action_cache",
-            "--noremote_accept_cached",
-            "--noremote_upload_local_results",
-            f'--symlink_prefix={cwd / "bazel-"}',
+            "@codeql//java/ql/integration-tests/kotlin/linux/custom_plugin/plugin",
         ],
-        _cwd=test_dir,
+        _cwd=semmle_code_dir,
     )
     shutil.copy(
-        "bazel-bin/java/ql/integration-tests/kotlin/linux/custom_plugin/plugin/plugin.jar",
+        f"{semmle_code_dir}/bazel-bin/external/ql+/java/ql/integration-tests/kotlin/linux/custom_plugin/plugin/plugin.jar",
         "plugin.jar",
     )
     codeql.database.create(