build: don't use deprecated $(location) pre-declared variable (#36308)

$(location) is not recommended in the bazel docs as depending on context it will either return the value of $(execpath) or $(rootpath). rules_nodejs now supports $(rootpath) and $(execpath) in templated_args of nodejs_binary.

PR Close #36308

tools/npm_integration_test/test_runner.js

@@ -340,7 +340,7 @@ class TestRunner {
   }
 }
 
-const config = require(process.argv[2]);
+const config = require(runfiles.resolveWorkspaceRelative(process.argv[2]));
 
 // set env vars passed from --define
 for (const k of Object.keys(config.envVars)) {