Email alert should be sent to the end user when admin changes the password

### The required feature described as a wish

As a User/Admin/Operator I would like to have email sent to the end user when admin changes the password

Steps to reproduce the issue

1. As a Admin user, Create a account with user role

2. Change the password

3. No email is sent to the end user mail id intimating the password change

Currently if a users tries the forgot password option, an email is sent to the end user based on the following global setting

```
user.password.reset.mail.template

Hello {{username}}!
You have requested to reset your password. Please click the following link to reset your password:
{{{resetLink}}}
If you did not request a password reset, please ignore this email.

Regards,
The CloudStack Team
```

Similarly a mail should be sent to the end user with the new password

Ref : https://docs.cloudstack.apache.org/en/4.22.0.0/adminguide/accounts.html#password-recovery-for-users-forgot-password

首先跟踪管理员修改密码的流程，并将其与 issue 中描述的现有忘记密码流程进行比较。阅读设置 user.password.reset.mail.template 以及链接的密码恢复文档；完成的标准是，管理员修改密码后，最终用户能够收到预期的通知。

由索引模型根据 Issue 内容生成。