Convert custom resources to native AWS for MediaLive & MediaPackage resources (Channels/endpoints)

[jilladams]

Describe the feature you'd like The CloudFormation Template could be updated to use the MediaLive and MediaPackage resource types.

Development notes Right now we use a custom resource that performs several functions:

• creates the MediaLive input channel
• can start the channel for the customer if selected
• creates the MediaPackage channel
• gathers anonymous metrics

Native support for both MediaLive and MediaPackage now exists, so it's preferable to switch to native AWS for both at once. For the switch:

• Double check native support for all the endpoints in use
• Change out custom resources with native support
• Rewrite any customer resources required for functions that are _not_covered by native AWS