Move db related basic functions to models/db (#17075)

* Move db related basic functions to models/db

* Fix lint

* Fix lint

* Fix test

* Fix lint

* Fix lint

* revert unnecessary change

* Fix test

* Fix wrong replace string

* Use *Context

* Correct committer spelling and fix wrong replaced words

Co-authored-by: zeripath <art27@cantab.net>

models/db/store.go

@@ -0,0 +1,18 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package db
+
+import (
+	"github.com/lafriks/xormstore"
+)
+
+// CreateStore creates a xormstore for the provided table and key
+func CreateStore(table, key string) (*xormstore.Store, error) {
+	store, err := xormstore.NewOptions(x, xormstore.Options{
+		TableName: table,
+	}, []byte(key))
+
+	return store, err
+}