aws-events: EventsMetrics are not exported

[Lewenhaupt]

Describe the bug

We tried to utilise EventMetrics from aws-events/lib/events-canned-metrics-generated but this isn't actually exported.
This is the error we receive when we tried to import it: Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: Package subpath './aws-events/lib/events-canned-metrics.generated' is not defined by "exports" in /node_modules/aws-cdk-lib/package.json
I don't think this should be exported like that but the problem is that index.js in aws-events does not re-export it.

Expected Behavior

Expect aws-events/lib/index.js to export * from 'events-canned-metrics.generated'.

Current Behavior

aws-events/lib/index.js does not export * from 'events-canned-metrics.generated'.

Reproduction Steps

Try to import EventMetrics

Possible Solution

No response

Additional Information/Context

No response

CDK CLI Version

2.38.1 (build a5ced21)

Framework Version

No response

Node.js Version

v16.9.1

OS

mac os

Language

Typescript

Language Version

No response

Other information

No response

[peterwoodworth]

What does EventsMetrics need to be exported for for your use case to work? We only explicitly export what we want the customer to access

[Lewenhaupt]

It's not needed, but most L2 constructs provide different metric helper functions on the construct itself. aws-events.Rule does not however and neither are these static helpers exported outside of aws-events package. So while it's entirely possible to construct the metric manually, this PR only aimed at improving consistency between packages.