feat(bedrock): add prompt chat templates

[aws-rafams]

Fixes #872

Note: to be able to merge this PR, it requires a CDK version bump from 2.166.0 to 2.174.0

Sample usage:

const cmk = new kms.Key(this, 'cmk', {});

const variantChat = PromptVariant.chat({
  variantName: 'variant1',
  model: BedrockFoundationModel.ANTHROPIC_CLAUDE_3_5_SONNET_V1_0,
  system: 'You are a helpful assistant that only speaks the language you`re told.',
  messages: [
    ChatMessage.user('From now on, you speak Japanese!'),
    ChatMessage.assistant('Konnichiwa!'),
    ChatMessage.user('From now on, you speak {{language}}!'),
  ],
  promptVariables: ['language'],
  toolConfiguration: {
    toolChoice: ToolChoice.AUTO,
    tools: [
      {
        toolSpec: {
          name: 'top_song',
          description: 'Get the most popular song played on a radio station.',
          inputSchema: {
            json: {
              type: 'object',
              properties: {
                sign: {
                  type: 'string',
                  description:
                    'The call sign for the radio station for which you want the most popular song. Example calls signs are WZPZ and WKR.',
                },
              },
              required: ['sign'],
            },
          },
        },
      },
    ],
  },
});

new Prompt(stack, 'prompt1', {
  promptName: 'prompt-chat',
  description: 'my first chat prompt',
  defaultVariant: variantChat,
  variants: [variantChat],
  kmsKey: cmk,
});

AWS Console

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[krokoko]

One thing: by upgrading to the latest cdk version, some tests are failing since the latest available Python version is 3.13. Currently, most lambdas are using 3.12, including the CRs. We can add a cdk nag suppress for now and do the upgrade in a separate PR since it will require some testing

[krokoko]

The go packaging is an issue with CDK v2.174 (see here ).