user should not be able to add test executions to test plan if he does not have edit permissions

When a user who doesn't have create or edit issues permission in a project is "able" to see Add Test Executions button on a Test Plan.

"When I tried to add Test executions, it was not added to the test plan but didn't give any error message"

In this case, the Add Test Executions and Create Test Execution buttons should not be shown or should be disabled.