SQLStore: allow to look for is_disabled flag (#18032)

* Add support for `is_disabled` to `CreateUser()`

* Add support for `is_disabled` to `SearchUsers()`
  Had to add it as a `string` type not as `bool`, since if that's property
  is omitted, we would have add it to SQL request, which might be dangerous

* Restructure desctructive tests and add more

pkg/models/user.go

@@ -62,6 +62,7 @@ type CreateUserCommand struct {
 	Password       string
 	EmailVerified  bool
 	IsAdmin        bool
+	IsDisabled     bool
 	SkipOrgSetup   bool
 	DefaultOrgRole string
 
@@ -146,6 +147,10 @@ type SearchUsersQuery struct {
 	Limit      int
 	AuthModule string
 
+	// We have to use string not bool, since there is cases when
+	// we don't care if user is disabled or not
+	IsDisabled string
+
 	Result SearchUserQueryResult
 }