Issue:
fix(users): add password validations

## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [X] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->
Closes #4412 


### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

<!--
Provide links to the files with corresponding changes.

Following are the paths where you can find config files:
1. `config`
2. `crates/router/src/configs`
3. `loadtest/config`
-->



## Motivation and Context
<!--
Why is this change required? What problem does it solve?
If it fixes an open issue, please link to the issue here.

If you don't have an issue, we'd recommend starting with one first so the PR
can focus on the implementation (unless it is an obvious bug or documentation fix
that will have little conversation).
-->
The mandatory condition for the password field was just not be empty . Following the PR, the password field will be subject to the following checks:
1.The password must be between 8 and 50 characters in length.
2.It must include at least one uppercase character.
3.It must include at least one lowercase character.
4.It must include at least one special character.
5.It must include at least one numeric character.

## How did you test it?
<!--
Did you write an integration/unit/API test to verify the code changes?
Or did you test this change manually (provide relevant screenshots)?
-->
1. Signup API ( local testing) 
```
curl --location 'http://localhost:8080/user/signup' \
--header 'Content-Type: application/json' \
--data-raw '{
    "email": "email value",
    "password": "456667sdvh",
    "country": "IN"
}'
```
Failure case response 
```
{
    "error": {
        "type": "invalid_request",
        "message": "Invalid Password",
        "code": "UR_09"
    }
}
```
2. Reset Password API (local testing)
```
curl --location 'http://localhost:8080/user/reset_password' \
--header 'Content-Type: application/json' \
--data '{
    "password": "456667sdvd",
    "token":"token from email after clicking Reset password in dashboard"
}'
```
Failure case response 
```
{
    "error": {
        "type": "invalid_request",
        "message": "Invalid Password",
        "code": "UR_09"
    }
}
``` 

## Checklist
<!-- Put an `x` in the boxes that apply -->

- [x] I formatted the code `cargo +nightly fmt --all`
- [x] I addressed lints thrown by `cargo clippy`
- [x] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible


Resolution:
<think>
PR Context:
- Title: fix(users): Revert add password validations
- Merged: 2024-05-03T15:31:33Z
- Files changed: 2 files
- Commits: 1 commits

Implementation approach:
Reverts juspay/hyperswitch#4489
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** fix(users): Revert add password validations (#4542)
Files to modify:


**crates/router/src/consts/user.rs**
  Modify existing code

**crates/router/src/types/domain/user.rs**
  Modify existing code