Add name to controller post_test job to use for CI requirement checks (#737)

*Issue #, if available:*

*Description of changes:*

Today, we don't have a way to require controller tests as the name of
the job matches those in other workflows. This gives the controller
tests a unique job name such that we can require specifically on it.

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Signed-off-by: Daniel Carl Jones <djonesoa@amazon.com>

Author: dannycjones

.github/workflows/controller-tests.yaml

@@ -40,6 +40,7 @@ jobs:
           make e2e-controller
 
   post_test:
+    name: "Controller Post Test"
     if: always()
     needs:
       - controller_test