Disable `sse` service if `sse` is disabled

[d7oc]

Description

Right now all parts of sse are disabled if features.sse.disabled is set to true except the service which was missing. This PR changes this glitch.

Related Issue

• Fixes none

Motivation and Context

Bugfix and alignment

How Has This Been Tested?

• tested with helm template

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Technical debt
• [ ] Tests only (no source changes)

Checklist:

• [x] Code changes
• [ ] Unit tests added
• [ ] Acceptance tests added
• [ ] Documentation generated (make docs) and committed
• [ ] Documentation ticket raised:
• [ ] Documentation PR created: