DRIVERS-2949 Use happy eyeballs test server in drivers-evergreen-tools (#1244)

Author: abr-egn

.evergreen/config.yml

@@ -1736,13 +1736,13 @@ functions:
         background: true
         binary: ${PYTHON3}
         args:
-          - .evergreen/happy-eyeballs-server.py
+          - ${DRIVERS_TOOLS}/.evergreen/happy_eyeballs/server.py
     - command: subprocess.exec
       params:
         working_dir: src
         binary: ${PYTHON3}
         args:
-          - .evergreen/happy-eyeballs-server.py
+          - ${DRIVERS_TOOLS}/.evergreen/happy_eyeballs/server.py
           - --wait
 
   "stop happy eyeballs server":
@@ -1751,7 +1751,7 @@ functions:
         working_dir: src
         binary: ${PYTHON3}
         args:
-          - .evergreen/happy-eyeballs-server.py
+          - ${DRIVERS_TOOLS}/.evergreen/happy_eyeballs/server.py
           - --stop
 
   "compile only":