[AWS::CodePipeline::Pipeline] implement drift detection

### Name of the resource

AWS::CodePipeline::Pipeline

### Resource name

_No response_

### Description

Currently, drift detection is not supported for the `AWS::CodePipeline::Pipeline` resource as it is not listed in https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/resource-import-supported-resources.html. Hence creating this issue to request drift detection support for the `AWS::CodePipeline::Pipeline` resource.

### Other Details

_No response_

Start with the AWS CloudFormation resource-import-supported-resources page linked in the issue and inspect this repository’s roadmap conventions for resource support requests. Confirm what AWS-side support is required for AWS::CodePipeline::Pipeline and what evidence would show the request is complete; the issue names no files or tests.

Written by the indexing model from the issue text.