Unified Storage: Add SQL template package (#87524)

* added sqltemplate package

* addded example

* fix linting issues

* improve code readability

* fix documentation

pkg/services/store/entity/sqlstash/sqltemplate/dialect_sqlite.go

@@ -0,0 +1,16 @@
+package sqltemplate
+
+// SQLite is an implementation of Dialect for the SQLite DMBS.
+var SQLite sqlite
+
+var _ Dialect = SQLite
+
+type sqlite struct {
+	// See:
+	//	https://www.sqlite.org/lang_keywords.html
+	standardIdent
+}
+
+func (sqlite) SelectFor(s ...string) (string, error) {
+	return rowLockingClauseAll(false).SelectFor(s...)
+}