chore: move testing back to standalone

Author: baileympearson

.evergreen/config.yml

@@ -2391,7 +2391,7 @@ buildvariants:
       NODE_LTS_NAME: gallium
       CLIENT_ENCRYPTION: true
     tasks:
-      - test-rapid-replica_set
+      - test-rapid-server
   - name: lint
     display_name: lint
     run_on: ubuntu1804-large

.evergreen/generate_evergreen_tasks.js

@@ -379,7 +379,7 @@ BUILD_VARIANTS.push({
     NODE_LTS_NAME: LATEST_LTS,
     CLIENT_ENCRYPTION: true
   },
-  tasks: ['test-rapid-replica_set']
+  tasks: ['test-rapid-server']
 });
 
 // singleton build variant for linting