Clarify 'Running DSI Locally' docs for reproducing Evergreen task failures

Per a chat with renctan, in order to reproduce the linkbench failure in BF-20945, some additional steps were necessary on top of the Running DSI Locally docs:

• copying the bootstrap.yml from the Evergreen linkbench task itself, rather than the example bootstrap.yml
• needing to take out "production: true" from the YAML
• needing to input own SSH keys

It'd be great if these docs could have an example catered towards reproducing an Evergreen task regression in order to highlight these sorts of steps.