revert the change to instr-express per feedback from David (correct identifying that @types/express *is* used in the test files)

Author: trentm

package-lock.json

@@ -53,6 +53,7 @@
     "@opentelemetry/contrib-test-utils": "^0.49.0",
     "@opentelemetry/sdk-trace-base": "^2.0.0",
     "@opentelemetry/sdk-trace-node": "^2.0.0",
+    "@types/express": "4.17.23",
     "@types/mocha": "10.0.10",
     "@types/node": "18.18.14",
     "@types/sinon": "17.0.4",