feat(CodePipelineActions): Add support for custom events in CodeCommi…

…t source action (#28008)

Custom Events were added to the CodeCommit Source action to trigger pipelines via custom event rules.

Closes [#12045](#12045).

----

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

packages/@aws-cdk-testing/framework-integ/test/aws-codepipeline-actions/test/custom-event-lambda/index.mjs

@@ -0,0 +1,9 @@
+import { CodePipelineClient, StartPipelineExecutionCommand } from '@aws-sdk/client-codepipeline';
+const codepipeline = new CodePipelineClient({});
+
+export const handler = async () => {
+  const command = new StartPipelineExecutionCommand({
+    name: 'IntegCustomEventPipeline',
+  });
+  await codepipeline.send(command);
+};