Issue:
feat(connector): [PowerTranz] Add cards 3ds support for PowerTranz connector

## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [x] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
3DS support for cards payment through powertranz connector


### 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
To support 3ds cards through powertranz connector


## How did you test it?


<img width="1293" alt="Screen Shot 2023-07-16 at 11 29 43 PM" src="https://github.com/juspay/hyperswitch/assets/20727986/deec39b1-2f46-4211-8f26-5618493a1cc9">

<img width="1723" alt="Screen Shot 2023-07-16 at 11 33 10 PM" src="https://github.com/juspay/hyperswitch/assets/20727986/21526ae3-acae-4f7e-848e-3af041fc2a58">


<img width="1294" alt="Screen Shot 2023-07-16 at 11 29 58 PM" src="https://github.com/juspay/hyperswitch/assets/20727986/d0b05451-453c-4460-a0e4-22aa618b7735">

## 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 submitted code
- [ ] I added unit tests for my changes where possible
- [ ] I added a [CHANGELOG](/CHANGELOG.md) entry if applicable


Resolution:
<think>
PR Context:
- Title: fix(connector): [PowerTranz] resolve pr comments and add comments
- Merged: 2023-07-18T12:40:36Z
- Files changed: 2 files
- Commits: 2 commits

Implementation approach:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [x] Bugfix
- [ ] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
resolve pr comments and add comments


### 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 change
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** fix(connector): [PowerTranz] resolve pr comments and add comments (#1726)
Files to modify:


**crates/router/src/connector/powertranz.rs**
  Modify existing code

**crates/router/src/connector/powertranz/transformers.rs**
  Modify existing code

**Commit 2:** fix(connector): [PowerTranz] resolve pr comments and add comments (#1726)
Files to modify:


**crates/router/src/connector/powertranz.rs**
  Modify existing code

**crates/router/src/connector/powertranz/transformers.rs**
  Modify existing code