tweak task combos

Author: blink1073

.evergreen/generated_configs/variants.yml

@@ -504,11 +504,11 @@ buildvariants:
   # Load balancer tests
   - name: load-balancer
     tasks:
-      - name: .test-named .server-6.0 .sharded-auth-ssl
-      - name: .test-named .server-7.0 .sharded-auth-ssl
-      - name: .test-named .server-8.0 .sharded-auth-ssl
-      - name: .test-named .server-rapid .sharded-auth-ssl
-      - name: .test-named .server-latest .sharded-auth-ssl
+      - name: .test-named .server-6.0 .sharded_cluster-auth-ssl
+      - name: .test-named .server-7.0 .sharded_cluster-auth-ssl
+      - name: .test-named .server-8.0 .sharded_cluster-auth-ssl
+      - name: .test-named .server-rapid .sharded_cluster-auth-ssl
+      - name: .test-named .server-latest .sharded_cluster-auth-ssl
     display_name: Load Balancer
     run_on:
       - rhel87-small

.evergreen/scripts/generate_config.py

@@ -201,7 +201,7 @@ def get_encryption_expansions(encryption):
 
 
 def create_load_balancer_variants():
-    tasks = [f".test-named .server-{v} .sharded-auth-ssl" for v in get_versions_from("6.0")]
+    tasks = [f".test-named .server-{v} .sharded_cluster-auth-ssl" for v in get_versions_from("6.0")]
     expansions = dict(TEST_NAME="load_balancer")
     return [
         create_variant(