fix secrets stored in JSON format (#473)

* fix secrets stored in JSON format

* add more tests

* fix lint and pass token to build

* add test cases

* add debug

* fix ordering of build steps

* fix test string format

* update test check

* fix test string format

* final cleanup

* remove comment

* remove unused var assignment

* simplify more

* simplify code and add more comments

.github/workflows/actionlint.yaml

@@ -16,4 +16,7 @@ jobs:
           # in our e2e tests.
           # This error occurs because vault-action's outputs are dynamic but
           # actionlint expects action.yml to define them.
-          args: '-ignore "property \"othersecret\" is not defined in object type"'
+          args: >
+            -ignore "property \"othersecret\" is not defined in object type"
+            -ignore "property \"jsonstring\" is not defined in object type"
+            -ignore "property \"jsonstringmultiline\" is not defined in object type"