Issue:
[REFACTOR] provide an identifier for the api key in the expiry reminder email

### Issue Description:

Currently, our system sends out reminder emails to merchants when their API key is about to expire. However, since merchants can create multiple API keys, the email lacks clarity on which specific API key is expiring.

### Proposed Solution:

Refactor the api key expiry reminder workflow to include the name and prefix of the expiring API key in email. This will help merchants easily identify which API key requires attention without confusion.

### Details:

Update the email template to include the following information:
API Key Name along with Prefix in below format -
`API_KEY_NAME [PREFIX]`

### Reference:
Check `ApiKeyExpiryTrackingData` type in https://github.com/juspay/hyperswitch/blob/2c95dcd19778726f476b219271dc42da182088af/crates/diesel_models/src/api_keys.rs 



Resolution:
<think>
PR Context:
- Title:  feat(connector): [Stripe] Metadata to connector metadata mapping
- Merged: 2024-01-30T11:50:54Z
- Files changed: 3 files
- Commits: 16 commits

Implementation approach:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [x] Enhancement
- [x] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->
Resolves [#3801](https://github.com/juspay/hyperswitch-cloud/issues/3801)

## Test Case
Testing can be done by creating a card/gpay/applepay payment and by passing the following metadata in PAYMENTS-CREATE:
"metadata": { "count_tickets": 1
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** feat(connector): [Stripe] Metadata to connector metadata mapping (#3295)
Co-authored-by: hyperswitch
Files to modify:


**crates/router/src/connector/stripe/transformers.rs**
  Add:
    - function: private::get_transaction_metadata

**crates/router/src/core/payments/transformers.rs**
  Modify existing code

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