chore(docker): prefix Hyperswitch Docker image URIs with `docker.juspay.io`

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

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

## Description
<!-- Describe your changes in detail -->

This PR updates Hyperswitch Docker images to be prefixed by `docker.juspay.io`. I've just done a global search-replace to be honest.

## Motivation and Context
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Why is this change required? What problem does it solve?
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If you don't have an issue, we'd recommend starting with one first so the PR
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N/A


## How did you test it?
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Tried the Docker Compose setup locally, didn't "test" out any of the other changes though.

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

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

<think>
PR Context:
- Title: chore(docker): prefix Hyperswitch Docker image URIs with `docker.juspay.io`
- Merged: 2025-03-21T11:37:07Z
- Files changed: 4 files
- Commits: 1 commits

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

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

## Description
<!-- Describe your changes in detail -->

This PR updates Hyperswitch Docker images to be prefixed by `docker.juspay.io`. This includes the same changes as #7368, I've cherry picked the same commit.

## Motivation and Context
<!--
Why is this change required? What problem does i
</think>

To implement this, you'll need to modify:


(No detailed commit information available)
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