fix(google-cloud-serverless): Make CloudEvent type compatible (#16661)

resolves #16653

As per the google cloud SDK
(https://github.com/cloudevents/sdk-javascript/blob/c07afa9b774deefa137a960d2d11adee0bf3674a/src/event/interfaces.ts#L10-L31),
`id` and `specversion` should be mandatory.

---------

Co-authored-by: Cursor Agent <cursoragent@cursor.com>

Author: AbhiPrasad

packages/google-cloud-serverless/src/gcpfunction/general.ts

@@ -29,10 +29,10 @@ export interface CloudFunctionsContext {
 
 export interface CloudEventsContext {
   [key: string]: any; // eslint-disable-line @typescript-eslint/no-explicit-any
+  id: string;
+  specversion: string;
   type?: string;
-  specversion?: string;
   source?: string;
-  id?: string;
   time?: string;
   schemaurl?: string;
   contenttype?: string;

packages/google-cloud-serverless/test/gcpfunction/cloud_event.test.ts

@@ -45,6 +45,8 @@ describe('wrapCloudEventFunction', () => {
   function handleCloudEvent(fn: CloudEventFunctionWithCallback): Promise<any> {
     return new Promise((resolve, reject) => {
       const context = {
+        id: 'test-event-id',
+        specversion: '1.0',
         type: 'event.type',
       };
 
@@ -232,6 +234,10 @@ describe('wrapCloudEventFunction', () => {
     const handler: CloudEventFunction = _context => 42;
     const wrappedHandler = wrapCloudEventFunction(handler);
     await handleCloudEvent(wrappedHandler);
-    expect(mockScope.setContext).toBeCalledWith('gcp.function.context', { type: 'event.type' });
+    expect(mockScope.setContext).toBeCalledWith('gcp.function.context', {
+      id: 'test-event-id',
+      specversion: '1.0',
+      type: 'event.type',
+    });
   });
 });