Issue:
[bug]: fix timestamp sent to kafka events

rdkafka library expects time in millis but we send seconds.
This can be reflected in the kafka-ui at localhost:8090 as well.


We can fix this by either truncating the unix_timestamp_nanos or padding the seconds.

Resolution:
<think>
PR Context:
- Title: fix(kafka): fix kafka timestamps sent from application
- Merged: 2024-05-23T09:28:10Z
- Files changed: 5 files
- Commits: 5 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
<!-- Describe your changes in detail -->
 fixes #4706

Convert secs to millis when sending creation timestamp to kafka

### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** fix(kafka): fix kafka timestamps sent from application (#4709)
Co-authored-by: hyperswitch-bot[bot] 
Files to modify:


**crates/router/src/services/kafka.rs**
  Modify existing code

**crates/router/src/services/kafka/dispute.rs**
  Remove:
    - function: private::creation_timestamp

**crates/router/src/services/kafka/payment_attempt.rs**
  Remove:
    - function: private::creation_timestamp

**crates/router/src/services/kafka/payment_intent.rs**
  Remove:
    - function: private::creation_timestamp

**crates/router/src/services/kafka/payout.rs**
  Remove:
    - function: private::creation_timestamp