fix(triggers): not published as part of v2 (#19168)

Config that explicitly excluded the package from the v2 build
had slipped in.

Fixes #19164.


----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: rix0rrr

packages/@aws-cdk/triggers/package.json

@@ -106,9 +106,6 @@
       "AWSLINT_BASE_CONSTRUCT": true
     }
   },
-  "ubergen": {
-    "exclude": true
-  },
   "publishConfig": {
     "tag": "latest"
   },

packages/aws-cdk-lib/package.json

@@ -349,6 +349,7 @@
     "@aws-cdk/pipelines": "0.0.0",
     "@aws-cdk/pkglint": "0.0.0",
     "@aws-cdk/region-info": "0.0.0",
+    "@aws-cdk/triggers": "0.0.0",
     "@aws-cdk/ubergen": "0.0.0",
     "@types/fs-extra": "^8.1.2",
     "@types/node": "^10.17.60",

packages/monocdk/package.json

@@ -346,6 +346,7 @@
     "@aws-cdk/pipelines": "0.0.0",
     "@aws-cdk/pkglint": "0.0.0",
     "@aws-cdk/region-info": "0.0.0",
+    "@aws-cdk/triggers": "0.0.0",
     "@aws-cdk/ubergen": "0.0.0",
     "@aws-cdk/yaml-cfn": "0.0.0",
     "@types/fs-extra": "^8.1.2",