DRIVERS-3377 Update deep_bson.json for compatibility with strong-typed benchmarks

[BorisDog]

This PR updates the leaf nodes structure from

{
    "right": {
        "right": "...",
        "left": "..."
    },
    "left": {
        "right": "...",
        "left": "..."
    }
}

to

{
    "right": {
        "rightValue": "...",
        "leftValue": "..."
    },
    "left": {
        "rightValue": "...",
        "leftValue": "..."
    }
}

In deep_bson.json

Please complete the following before merging:

• [v] Is the relevant DRIVERS ticket in the PR title?

• [v] Update changelog.
• [v] Test changes in at least one language driver.
• [] Test these changes against all server versions and topologies (including standalone, replica set, and sharded
  clusters). NA