CDRIVER-4156 required updating the path to the Python interpreter in the Evergreen toolchain. The discussion in the associated PR revealed that driver projects are not meant to be consumers of the toolchain, which is maintained by the server team for use by the server project without any commitment to stability or support for use by other projects. The instances of using toolchain components in the C driver need to be addressed and modified to not use the toolchain components. Note that the PR discussion lists some instances, but work on this ticket should include a comprehensive review of the Evergreen helper scripts to identify all references to the toolchain to ensure that all references are removed.