Remove unnecessary Jira template test

What does this MR do?

This MR removes a test that is not needed because services that where created from a template doesn't behave different from other project services. When a template is applied to a project it copies all attributes to a new service and sets template = false and project_id to the ID of the project.

A service should not be a template and attached to a project at the same time. To simulate a template applied to a project we would need to use Projects::CreateService. But this test would not belong to services_controller_spec.

The test was originally introduced in 72b59d6e

In !26563 (merged) I'm adding a validation that for absence of project_id when the service is a template. This test would fail the validation.

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• [-] Label as security and @ mention @gitlab-com/gl-security/appsec
• [-] The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• [-] Security reports checked/validated by a reviewer from the AppSec team