Fix user settings sidebar showing disabled features on some pages (#36958) (#36969)

Backport #36958 by @bircni

Move UserDisabledFeatures context data into a shared SettingsCtxData
middleware for the /user/settings route group, so it is set consistently
on all pages (including Notifications, Actions, etc.) instead of only on
the handlers that remembered to set it individually.

Fixes #36954

Co-authored-by: Nicolas <bircni@icloud.com>

routers/web/repo/setting/secrets.go

@@ -7,7 +7,6 @@ import (
 	"errors"
 	"net/http"
 
-	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/templates"
 	shared "code.gitea.io/gitea/routers/web/shared/secrets"
@@ -74,7 +73,6 @@ func Secrets(ctx *context.Context) {
 	ctx.Data["Title"] = ctx.Tr("actions.actions")
 	ctx.Data["PageType"] = "secrets"
 	ctx.Data["PageIsSharedSettingsSecrets"] = true
-	ctx.Data["UserDisabledFeatures"] = user_model.DisabledFeaturesWithLoginType(ctx.Doer)
 
 	sCtx, err := getSecretsCtx(ctx)
 	if err != nil {