upgpkg: 2.11.2-1: Upstream release

https://github.com/caddyserver/caddy/releases/tag/v2.11.2
https://github.com/caddyserver/caddy/releases/tag/v2.11.1

Also:
- Remove signature verification, upstream signed with SSH key, not supported
- Handle version reporting with linker flags instead of patching
- Deselect integration tests (with -short) to ensure they pass
- Work from $srcdir in package(), most files are copied from there anyways

REUSE.toml

@@ -18,7 +18,6 @@ path = [
     "*.desktop",
     "*.hook",
     "Caddyfile",
-    "override-main-module-version.patch",
     "use-data-dir-for-autosave.patch",
 ]
 SPDX-FileCopyrightText = "Arch Linux contributors"