SERVER-81251 Ensure future git tag variant always runs lastContinuous suites (#19452)

GitOrigin-RevId: 228b9fbf1ab379204eeaff19ff70b865ad20c902

etc/evergreen_yml_components/variants/rhel/test_dev_master_branch_only.yml

@@ -614,6 +614,8 @@ buildvariants:
     compile_variant: linux-x86-dynamic-compile-future-tag-multiversion
     test_flags: >-
       --excludeWithAnyTags=future_git_tag_incompatible
+    unique_gen_suffix: "-future"
+    last_versions: last_lts,last_continuous
   depends_on:
   - name: version_gen
     variant: generate-tasks-for-version

evergreen/prelude_mongo_task_generator.sh

@@ -1,6 +1,6 @@
 function setup_mongo_task_generator {
   if [ ! -f mongo-task-generator ]; then
-    curl -L https://github.com/mongodb/mongo-task-generator/releases/download/v0.7.11/mongo-task-generator --output mongo-task-generator
+    curl -L https://github.com/mongodb/mongo-task-generator/releases/download/v0.7.12/mongo-task-generator --output mongo-task-generator
     chmod +x mongo-task-generator
   fi
 }