Sleep between ARWWI calls in PRA

- Otherwise, we might be overloading the Vault service with
  multiple API calls at high frequency.

Issue: ZENKO-4909

tests/ctst/steps/pra.ts

@@ -296,6 +296,9 @@ When('the DATA_ACCESSOR user tries to perform PutObject on {string} site', { tim
             } catch (err) {
                 this.logger.error('Failed to setup entity', { err });
             }
+            if (!conditionOk) {
+                await Utils.sleep(1000);
+            }
         }
 
         this.addCommandParameter({ bucket: this.getSaved<string>('bucketName') });