[DOCUMENTATION] Add Sandbox Tutorial for Creating Customer Representative Workloads

[IanHoang]

Please provide details on how and where the documentation can be improved

Creating customer representative workloads is a complex task and many users often ask what are the characteristics that make a custom workload "representative". Although users might have guidance on how to build and finetune workloads to capture characteristics that are seen in production environments, it would be nice for users to have a "sandbox" environment that they can walk through and use build basic customer representative workloads.

We should have a section of the documentation containing a sandbox OpenSearch cluster environment using a sample workload that users can interact with and build workloads from. This sandbox environment should come with a tutorial on the different types of representative workloads users can create based on characteristics pinpointed in the sample workload.

Provide references

No response

Additional context

No response