Reduce usage of db.DefaultContext (#27073)

Part of #27065

This reduces the usage of `db.DefaultContext`. I think I've got enough
files for the first PR. When this is merged, I will continue working on
this.

Considering how many files this PR affect, I hope it won't take to long
to merge, so I don't end up in the merge conflict hell.

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/web/repo/repo.go

@@ -80,7 +80,7 @@ func CommitInfoCache(ctx *context.Context) {
 }
 
 func checkContextUser(ctx *context.Context, uid int64) *user_model.User {
-	orgs, err := organization.GetOrgsCanCreateRepoByUserID(ctx.Doer.ID)
+	orgs, err := organization.GetOrgsCanCreateRepoByUserID(ctx, ctx.Doer.ID)
 	if err != nil {
 		ctx.ServerError("GetOrgsCanCreateRepoByUserID", err)
 		return nil