reenable aws-sns-verify testsuite (fixes #6810 and closes #6777)

build-constraints.yaml

@@ -8035,6 +8035,9 @@ package-flags:
 
     hackage-security:
       Cabal-syntax: true
+
+    aws-sns-verify:
+      development: true
 # end of package-flags
 
 # Special configure options for individual packages
@@ -8791,7 +8794,6 @@ expected-test-failures:
     - yarn-lock
     - yesod-gitrev # needs a git repo https://github.com/commercialhaskell/stackage/issues/6132
     - yesod-markdown # https://github.com/pbrisbin/yesod-markdown/issues/77
-    - aws-sns-verify # https://github.com/commercialhaskell/stackage/issues/6777
 
     # Assertion failures due to module name ambiguity.
     # These _should_ be fixed by using the `hide` section of this file