community/gitea: upgrade to 1.22.0

Breaking changes:
https://github.com/go-gitea/gitea/releases/tag/v1.22.0
Consider open the references to read more

• Improve reverse proxy documents and clarify the AppURL guessing behavior (#31003) (#31020)
• Remember log in for a month by default (#30150)
• Breaking summary for template refactoring (#29395)
  • All custom templates need to follow these changes
• Recommend/convert to use case-sensitive collation for MySQL/MSSQL (#28662)
• Make offline mode as default to not connect external avatar service by default (#28548)
• Include public repos in the doer's dashboard for issue search (#28304)
• Use restricted sanitizer for repository description (#28141)
• Support storage base path as prefix (#27827)
• Enhanced auth token / remember me (#27606)
• Rename the default themes to gitea-light, gitea-dark, gitea-auto (#27419)
  • If you didn't see the new themes, please remove the [ui].THEMES config option from app.ini
• Require MySQL 8.0, PostgreSQL 12, MSSQL 2012 (#27337)

APKBUILD changes:

• add -doc sub-package for MIT license
• enable/fix tests (aarch64 and x86_64 only)