(ivs-alpha): support advanced channel type

[mazyu36]

Describe the feature

Amazon IVS has been supporting advanced channel types since June 2023.
However, the current Channel Construct only supports BASIC and STANDARD channel types.

See:
https://aws.amazon.com/about-aws/whats-new/2023/06/amazon-ivs-advanced-channel-types-input-encoding/?nc1=h_ls

Use Case

To use advanced channel types using CDK.

Proposed Solution

• Add ADVANCED_HD and ADVANCED_SD to the ChannelType.
• Add preset property to the Channel Construct. Additionally, implement validation according to the following:

An optional transcode preset for the channel. This is selectable only for ADVANCED_HD and ADVANCED_SD channel types. For those channel types, the default preset is HIGHER_BANDWIDTH_DELIVERY. For other channel types (BASIC and STANDARD), preset is the empty string ("").

See: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ivs-channel.html#cfn-ivs-channel-preset

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

CDK version used

2.140.0

Environment details (OS name and version, etc.)

MacOS

[ashishdhingra]

• https://github.com/aws/aws-cdk/tree/main/packages/aws-cdk-lib/aws-ivs, there are no official hand-written (L2) constructs for this service yet.

  An experimental construct library for this service is available in preview. Since it is not stable yet, it is distributed as a separate package so that you can pin its version independently of the rest of the CDK. See the package:
  
  @aws-cdk/aws-ivs-alpha
  

• The CF documentation link does specify support for ADVANCED_SD and ADVANCED_HD channel types. However, CDK ChannelType enum is missing these channel types.

@mazyu36 Feel free to contribute a PR for this feature request which could be reviewed by the team.

Thanks,
Ashish