feat: gitea app operator

[ferruhcihan]

Implements:

https://jira.linode.com/browse/APL-23
https://jira.linode.com/browse/APL-13

Description:

This PR updates the gitea-operator files and eliminates the gitea-prepare job, integrating its tasks into the gitea-operator for improved task management.
Is paired with: linode/apl-tasks#103

Checklist

• Architecture Design Records have been added as adr/*.md and appended to list in adr/_index.md, if applicable.
• The values-schema.yaml file and test/** fixtures have been updated to reflect code changes, if applicable.
• The OpenApi Schema from redkubes/otomi-api project is compatible with definitions from values-schema.yaml file, if applicable.
• Helm releases are meeting otomi's baseline security policies, if applicable.
• Helm chart and helmfile changes are tested against upgrade scenario, if applicable.

[j-zimnowoda]

Looks good, just few minor remarks

[j-zimnowoda]

Well done. thanks for adding the comments!