Add release note for --load-list

This is a follow up patch to:
    I75488871ac797d6bec4e2834c9d1b0c7885c891b

Change-Id: Ic181159530a86532a7d5529f42e216a09fa98b72
diff --git a/releasenotes/notes/add-load-list-cmd-35a4a2e6ea0a36fd.yaml b/releasenotes/notes/add-load-list-cmd-35a4a2e6ea0a36fd.yaml
new file mode 100644
index 0000000..403bbad
--- /dev/null
+++ b/releasenotes/notes/add-load-list-cmd-35a4a2e6ea0a36fd.yaml
@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Adds a new cli option to tempest run, --load-list <list-file>
+    to specify target tests to run from a list-file. The list-file
+    supports the output format of the tempest run --list-tests
+    command.