fix: backup gitea when gitea not enabled

[dennisvankekem]

Considerations

• I have tested the changes in both light and dark mode.
• I have considered the need for new unit tests.
• I have tested the changes on a cluster.
• I have included relevant documentation updates.
• I have an approved Figma design or have reflected my changes in Figma
• I have verified that the UI/UX is consistent in major browsers (e.g., Chrome, Firefox, Safari, Edge).
• I have tested the changes for responsiveness in different screen resolutions.
• I have tested expected error states and verified that the user is presented with informative error messages.
• I have tested the feature with unusual or extreme inputs (e.g., very long strings, empty states, clicking a button multiple times quickly).

[merll]

Not tested, but since Gitea has both an application and a database backup, I think both would need to be read only if Gitea is not enabled.

Suggested change

	if (!appsEnabled.gitea) set(schema, 'properties.gitea.readOnly', true)
	if (!appsEnabled.gitea) {
	set(schema, 'properties.database.properties.gitea.readOnly', true)
	set(schema, 'properties.gitea.readOnly', true)
	}