feat(groups): Launch specific checks from groups and services (#1204)

util/checklist_example.json

@@ -0,0 +1,6 @@
+{
+  "aws": [
+    "check11",
+    "check12"
+  ]
+}

util/checklist_example.txt

@@ -1,6 +0,0 @@
-# You can add a comma seperated list of checks like this:
-check11,check12
-extra72 # You can also use newlines for each check
-check13 # This way allows you to add inline comments
-# Both of these can be combined if you have a standard list and want to add
-# inline comments for other checks.