SSM Parameter Store Error Message When Requesting Invalid Version (#3977)

* Implement correct error when requesting specific version of a parameter which exists but does not have this version

* removing trailing whitespace causing lint failure

* Adding unit tests and fixing linting for new error handling

* Fixing small bug in response message

* Revert change in get_parameters as versioning is not currently implemented in this method. Will fix as a separate PR

moto/ssm/models.py

@@ -1217,7 +1217,12 @@ class SimpleSystemManagerBackend(BaseBackend):
                     )
                     if len(result) > 0:
                         return result[-1]
-
+                    elif len(parameters) > 0:
+                        raise ParameterVersionNotFound(
+                            "Systems Manager could not find version %s of %s. "
+                            "Verify the version and try again."
+                            % (version_or_label, name_prefix)
+                        )
                 result = list(
                     filter(lambda x: version_or_label in x.labels, parameters)
                 )