Password rotation in secrets (#1749)

* password rotation in K8s secrets
* add db connection to syncSecrets
* add user retention
* add e2e test
* cleanup on username mismatch if rotation was switched off
* add unit test for syncSecrets + new updateSecret func

pkg/spec/types.go

@@ -55,6 +55,7 @@ type PgUser struct {
 	MemberOf   []string          `yaml:"inrole"`
 	Parameters map[string]string `yaml:"db_parameters"`
 	AdminRole  string            `yaml:"admin_role"`
+	IsDbOwner  bool              `yaml:"is_db_owner"`
 	Deleted    bool              `yaml:"deleted"`
 }