Missing LambdaStep in sagemaker pipelines Visual Editor

### Product Version

- [ ] Amazon SageMaker Studio Classic
- [x] Amazon SageMaker Studio
- [ ] Issue is not related to SageMaker Studio

### Issue Description

AWS documentation states that you can create LambdaStep as part of your sagemaker pipeline however there is no option to select this step type in the sagemaker pipelines visual editor.


### Expected Behavior

There should be an icon for you to drag a LambdaStep from the Pipeliine Step Types dropdown menu to the visual editor board and start configuring a lambda step on the pipeline.

### Observed Behavior

The Icon is missing and not sure how to define a lambda step into the pipeline

### Product Category

Pipelines

### Feedback Category

Configuration and Setup

### Other Details

_No response_

Start by comparing the AWS documentation for LambdaStep with the SageMaker Studio Pipelines visual editor described in this issue, reproducing the missing option if access is available. Done means LambdaStep appears in the Pipeline Step Types menu, can be added to the board, and exposes configuration for a pipeline Lambda step.

Written by the indexing model from the issue text.