Treat loadbalanced as its own topology in tests

Author: alcaeus

.evergreen/config/generated/test/load-balanced-5.0.yml

@@ -1,6 +1,6 @@
 tasks:
   - name: "test-mongodb-%mongodbVersion%-loadbalanced"
-    tags: ["sharded", "local", "%mongodbVersion%", "loadbalanced"]
+    tags: ["loadbalanced", "local", "%mongodbVersion%"]
     commands:
       - func: "bootstrap mongo-orchestration"
         vars:

.evergreen/config/generated/test/load-balanced-6.0.yml

@@ -17,6 +17,7 @@ buildvariants:
       - ".standalone .local !.3.6 !.4.0 !.4.2 !.4.4 !.5.0"
       - ".replicaset .local !.3.6 !.4.0 !.4.2 !.4.4 !.5.0"
       - ".sharded .local !.3.6 !.4.0 !.4.2 !.4.4 !.5.0"
+      - ".loadbalanced .local !.3.6 !.4.0 !.4.2 !.4.4 !.5.0"
       - "test-atlas-connectivity"
       - ".ocsp !.4.4"
     display_tasks:
@@ -50,6 +51,7 @@ buildvariants:
       - ".standalone .local !.6.0 !.7.0 !.rapid !.latest"
       - ".replicaset .local !.6.0 !.7.0 !.rapid !.latest"
       - ".sharded .local !.6.0 !.7.0 !.rapid !.latest"
+      - ".loadbalanced .local !.6.0 !.7.0 !.rapid !.latest"
       - ".ocsp !.6.0 !.7.0 !.rapid !.latest"
     display_tasks:
       - name: "test-ocsp-4.4"