[open-telemetry-exporter] update build:test script (#32645)

to not do any real work.

Our convention for `build:test` is to build/setup necessary files for
testing,
for example, generating test certificates. It is not `build` and `test`.

sdk/monitor/monitor-opentelemetry-exporter/package.json

@@ -23,11 +23,11 @@
     "lint:fix": "eslint package.json api-extractor.json src test --fix --fix-type [problem,suggestion]",
     "pack": "npm pack 2>&1",
     "report": "nyc report --reporter=json",
-    "test": "npm run clean && npm run build:test",
+    "test": "npm run clean && npm run unit-test",
     "test-opentelemetry-versions": "node test-opentelemetry-versions.js 2>&1",
     "test:browser": "npm run unit-test:browser",
-    "build:test": "npm run build && npm run unit-test:node",
-    "test:node": "npm run clean && npm run build:test && npm run unit-test:node",
+    "build:test": "echo skipped",
+    "test:node": "npm run clean && npm run unit-test:node",
     "unit-test": "npm run unit-test:node && npm run unit-test:browser",
     "unit-test:browser": "echo skipped",
     "unit-test:node": "dev-tool run test:vitest",