feat(ivs-alpha): support advanced channel type (aws#30086)

### Issue # (if applicable)

Closes aws#30075 

### Reason for this change
As described in the issue.

### Description of changes
* Add `ADVANCED_HD` and `ADVANCED_SD` to the `ivs.ChannelType`.
* Add `preset` property to the Channel Construct. Additionally, validation has been implemented to allow setting the preset property only when using the Advanced channel type

### Description of how you validated changes
Add both unit tests and integ tests.

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

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

packages/@aws-cdk/aws-ivs-alpha/README.md

@@ -39,6 +39,23 @@ You can create a channel
 const myChannel = new ivs.Channel(this, 'Channel');
 ```
 
+You can use Advanced Channel type by setting the `type` property to
+`ivs.ChannelType.ADVANCED_HD` or `ivs.ChannelType.ADVANCED_SD`.
+
+Additionally, when using the Advanced Channel type, you can set
+the `preset` property to `ivs.Preset.CONSTRAINED_BANDWIDTH_DELIVERY`
+or `ivs.Preset.HIGHER_BANDWIDTH_DELIVERY`.
+
+For more information, see [Amazon IVS Streaming Configuration](https://docs.aws.amazon.com/ivs/latest/LowLatencyUserGuide/streaming-config.html).
+
+```ts
+const myChannel = new ivs.Channel(this, 'myChannel', {
+  type: ivs.ChannelType.ADVANCED_HD,
+  preset: ivs.Preset.CONSTRAINED_BANDWIDTH_DELIVERY,
+});
+```
+
+
 ### Importing an existing channel
 
 You can reference an existing channel, for example, if you need to create a
@@ -87,5 +104,3 @@ const myChannel = new ivs.Channel(this, 'Channel', {
   authorized: true, // default value is false
 });
 ```
-
-

packages/@aws-cdk/aws-ivs-alpha/lib/channel.ts

@@ -53,22 +53,53 @@ export enum LatencyMode {
 /**
   * The channel type, which determines the allowable resolution and bitrate.
   * If you exceed the allowable resolution or bitrate, the stream probably will disconnect immediately.
+  *
+  * @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ivs-channel.html
 */
 export enum ChannelType {
   /**
-   * Multiple qualities are generated from the original input, to automatically give viewers the best experience for
-   * their devices and network conditions.
-   *
-   * @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ivs-channel.html
+   * Multiple qualities are generated from the original input, to automatically give viewers the best experience for their devices and network conditions.
+   * Transcoding allows higher playback quality across a range of download speeds. Resolution can be up to 1080p and bitrate can be up to 8.5 Mbps.
+   * Audio is transcoded only for renditions 360p and below; above that, audio is passed through.
    */
   STANDARD = 'STANDARD',
 
   /**
-   * delivers the original input to viewers. The viewer’s video-quality choice is limited to the original input.
-   *
-   * @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ivs-channel.html
+   * Delivers the original input to viewers. The viewer’s video-quality choice is limited to the original input.
    */
   BASIC = 'BASIC',
+
+  /**
+   * Multiple qualities are generated from the original input, to automatically give viewers the best experience for their devices and network conditions.
+   * Input resolution can be up to 1080p and bitrate can be up to 8.5 Mbps; output is capped at SD quality (480p).
+   * Audio for all renditions is transcoded, and an audio-only rendition is available.
+   */
+  ADVANCED_SD = 'ADVANCED_SD',
+
+  /**
+   * Multiple qualities are generated from the original input, to automatically give viewers the best experience for their devices and network conditions.
+   * Input resolution can be up to 1080p and bitrate can be up to 8.5 Mbps; output is capped at HD quality (720p).
+   * Audio for all renditions is transcoded, and an audio-only rendition is available.
+   */
+  ADVANCED_HD = 'ADVANCED_HD',
+}
+
+/**
+  * An optional transcode preset for the channel. This is selectable only for ADVANCED_HD and ADVANCED_SD channel types.
+  *
+  * @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ivs-channel.html
+*/
+export enum Preset {
+  /**
+   * Use a lower bitrate than STANDARD for each quality level. Use it if you have low download bandwidth and/or simple video content (e.g., talking heads).
+   */
+  CONSTRAINED_BANDWIDTH_DELIVERY = 'CONSTRAINED_BANDWIDTH_DELIVERY',
+
+  /**
+   * Use a higher bitrate for each quality level. Use it if you have high download bandwidth and/or complex video content (e.g., flashes and quick scene changes).
+   */
+  HIGHER_BANDWIDTH_DELIVERY = 'HIGHER_BANDWIDTH_DELIVERY',
+
 }
 
 /**
@@ -107,6 +138,14 @@ export interface ChannelProps {
    * @default ChannelType.STANDARD
    */
   readonly type?: ChannelType;
+
+  /**
+   * An optional transcode preset for the channel. Can be used for ADVANCED_HD and ADVANCED_SD channel types.
+   * When LOW or STANDARD is used, the preset will be overridden and set to none regardless of the value provided.
+   *
+   * @default - Preset.HIGHER_BANDWIDTH_DELIVERY if channelType is ADVANCED_SD or ADVANCED_HD, none otherwise
+   */
+  readonly preset?: Preset;
 }
 
 /**
@@ -162,11 +201,20 @@ export class Channel extends ChannelBase {
       throw new Error(`channelName must contain only numbers, letters, hyphens and underscores, got: '${this.physicalName}'`);
     }
 
+    let preset;
+
+    if (props.type && [ChannelType.STANDARD, ChannelType.BASIC].includes(props.type) && props.preset) {
+      preset = '';
+    } else {
+      preset = props.preset;
+    }
+
     const resource = new CfnChannel(this, 'Resource', {
       authorized: props.authorized,
       latencyMode: props.latencyMode,
       name: this.physicalName,
       type: props.type,
+      preset,
     });
 
     this.channelArn = resource.attrArn;