ci(cypress): removal of metadata overwriting during mca update call

## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [x] Enhancement
- [x] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [x] CI/CD

## Description
<!-- Describe your changes in detail -->
The Connector Update Body is being overwritten, which included the metadata as well. Due to this, if there were any required metadata fields of a connector, then the Connector Update Test would fail.

For example, `Braintree` connector has a required metadata field, and while testing the Connector Update, just because it was being overwritten by the `update-connector-body.json` fixture, the test fails as shown in the following screenshot.
<img width="2117" alt="image" src="https://github.com/user-attachments/assets/bf8b384a-92be-4f86-bf09-48fd52f01db4" />

### 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).
-->
While adding the Card test Flows for the `Braintree` connector, the Connector Update Test Failed.

## 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)?
-->
Running the `0000-CoreFlows.cy.js` for `Braintree` connector

<img width="2116" alt="image" src="https://github.com/user-attachments/assets/7b505791-4da3-4fae-a94c-142dcfc69b53" />

<img width="752" alt="image" src="https://github.com/user-attachments/assets/f9fc5350-4bf9-4b2e-a5da-a62264f5c1b1" />


## Checklist
<!-- Put an `x` in the boxes that apply -->

- [ ] I formatted the code `cargo +nightly fmt --all`
- [ ] I addressed lints thrown by `cargo clippy`
- [ ] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible

<think>
PR Context:
- Title: ci(cypress): add Braintree connector configs for cypress test flows
- Merged: 2025-04-24T07:23:48Z
- Files changed: 3 files
- Commits: 30 commits

Implementation approach:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [x] Enhancement
- [x] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [x] CI/CD

## Description
<!-- Describe your changes in detail -->
Adding Cypress Test Case Flows related Configs for the `Braintree` Payment Processor.

~_Note: The Connector Update Test will fail until https://github.com/juspay/hyperswitch/pull/7622 is not merged to the `main` branch._~ (#7622 is Merged)
</think>

To implement this, you'll need to modify:


(No detailed commit information available)