Output from "cockroach debug doctor recreate" needs to set allow_unsafe_internals to true.

**Describe the problem**

The output of `cockroach debug doctor recreate` creates a SQL file that could be uploaded to a cluster to recreate objects based on a debug zip.

However, since the introduce of the `allow_unsafe_internals` session variable, the file errors when it's sent to a cluster. The session variable has to be overridden manually at the top of the file now.

**Expected behavior**
Add a `SET allow_unsafe_internals = true;` to the top of the file generated by `cockroach debug doctor recreate`.

Jira issue: CRDB-65191

Start by locating the cockroach debug doctor recreate command and the code that assembles its generated SQL file. Run the recreation workflow to inspect the output; done means the file begins with SET allow_unsafe_internals = true; so it can be uploaded without a manual edit.

Written by the indexing model from the issue text.