fix(router): Move Customer PML endpoint to OLAP (v2)

[This PR](https://github.com/juspay/hyperswitch/pull/7241) added customer PML for v2, but the route was incorrectly added under OLTP instead of OLAP, need to fix
<think>
PR Context:
- Title: fix(router): Move Customer PML endpoint to OLAP (v2)
- Merged: 2025-06-18T08:23:04Z
- Files changed: 1 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
<!-- Describe your changes in detail -->
Moved customer saved PML route to OLAP in v2

### Additional Changes

- [x] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

<!--
Prov
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** fix(router): Move Customer PML endpoint to OLAP (v2) (#8303)
Files to modify:


**crates/router/src/routes/app.rs**
  Modify existing code
{"issue_number": 8302, "pr_number": 8303, "commits_count": 1, "files_changed": 1, "response_length": 923, "file_count": 3, "needs_breakdown": false}