https://github.com/10gen/mongo/commit/9bcf367c149018461729928f658521d6d3f165c2 brought in support for OAuth in the `evergreen-py` package. This causes the Evergreen API client to favor OAuth over a static API Key from `~/.evergreen.yml`, if both are present.

Since `buildscripts/setup_spawnhost_script` runs before a user would have an opportunity to `evergreen login`, we need to ensure the static API key is used.