[GITEA] Use maintained gziphandler

- https://github.com/NYTimes/gziphandler doesn't seems to be maintained
anymore and Forgejo already includes
https://github.com/klauspost/compress which provides a maintained and
faster gzip handler fork.
- Enables Jitter to prevent BREACH attacks, as this *seems* to be
possible in the context of Forgejo.

(cherry picked from commit cc2847241d)
(cherry picked from commit 99ba56a876)

Conflicts:
	go.sum
	https://codeberg.org/forgejo/forgejo/pulls/1581
(cherry picked from commit 711638193d)
(cherry picked from commit 9c12a37fde)
(cherry picked from commit 91191aaaed)
(cherry picked from commit 72be417f84)
(cherry picked from commit 98497c84da)
(cherry picked from commit fba042adb5)
(cherry picked from commit dd2414f226)

Conflicts:
	routers/web/web.go
	https://codeberg.org/forgejo/forgejo/issues/2016

modules/web/handler.go

@@ -147,6 +147,16 @@ func toHandlerProvider(handler any) func(next http.Handler) http.Handler {
 		}
 	}
 
+	if hp, ok := handler.(func(next http.Handler) http.HandlerFunc); ok {
+		return func(next http.Handler) http.Handler {
+			h := hp(next) // this handle could be dynamically generated, so we can't use it for debug info
+			return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
+				routing.UpdateFuncInfo(req.Context(), funcInfo)
+				h.ServeHTTP(resp, req)
+			})
+		}
+	}
+
 	provider := func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(respOrig http.ResponseWriter, req *http.Request) {
 			// wrap the response writer to check whether the response has been written