Issue:
Bug: chore(ci): `adyen` and `stripe` postman tests are failing



Multiple Test Cases have been failing on Postman,

- Adyen: <span style="color:red">88 Failures</span>
- Stripe: <span style="color:red">3 Failures</span>
  <img width="500" alt="Image" src="https://github.com/user-attachments/assets/522a3f3b-ef4d-450d-b584-8233d9008389" />

Pull request description:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [x] Bugfix
- [ ] New feature
- [x] Enhancement
- [x] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [x] CI/CD

## Description
<!-- Describe your changes in detail -->
Deleting API Key needs Merchant ID. So, deleting it after deleting the merchant itself yields a error message in the response which goes like `"API key not provided or invalid API key used"`, but, its solely because the Merchant ID used is not authenticated because the Merchant ID is already deleted.

### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

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1. `config`
2. `crates/router/src/configs`
3. `loadtest/config`
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## Motivation and Context
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The respective test case was failing in the Automated Tests Run.

## How did you test it?
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Did you write an integration/unit/API test to verify the code changes?
Or did you test this change manually (provide relevant screenshots)?
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<img width="864" alt="image" src="https://github.com/user-attachments/assets/86d7ab3a-46b4-4476-804f-b200b3d67a05" />

The Remaining failures are because of outdated certificates and their keys. Once we update that it will be like the following

<img width="493" alt="image" src="https://github.com/user-attachments/assets/e45efb84-44d8-4f32-8d65-5ed7c1567a79" />


## 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


Testing:

<img width="864" alt="image" src="https://github.com/user-attachments/assets/86d7ab3a-46b4-4476-804f-b200b3d67a05" />

The Remaining failures are because of outdated certificates and their keys. Once we update that it will be like the following

<img width="493" alt="image" src="https://github.com/user-attachments/assets/e45efb84-44d8-4f32-8d65-5ed7c1567a79" />

Patch:
diff --git a/postman/collection-dir/stripe/PaymentConnectors/.meta.json b/postman/collection-dir/stripe/PaymentConnectors/.meta.json
index 6d68eeab4ab..c32be7223a6 100644
--- a/postman/collection-dir/stripe/PaymentConnectors/.meta.json
+++ b/postman/collection-dir/stripe/PaymentConnectors/.meta.json
@@ -5,7 +5,7 @@
     "Payment Connector - Update",
     "List Connectors by MID",
     "Payment Connector - Delete",
-    "Merchant Account - Delete",
-    "Delete API Key"
+    "Delete API Key",
+    "Merchant Account - Delete"
   ]
 }