## Description
> This code change focuses on moving the File I/O operations related to
plugins API to elastic and parallel threads for subscription and
publishing. It will allow the `nioEventLoop` threadpool to not be locked
on file I/O.
Fixes #`Issue Number`
_or_
Fixes `Issue URL`
> [!WARNING]
> _If no issue exists, please create an issue first, and check with the
maintainers if the issue is valid._
## Automation
/ok-to-test tags="@tag.Sanity"
### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results -->
> [!TIP]
> 🟢🟢🟢 All cypress tests have passed! 🎉🎉🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/10138493266>
> Commit: cc3b5f1ac44138985ba228e8b2d4f8e324ed6e7f
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=10138493266&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Sanity`
> Spec:
> <hr>Mon, 29 Jul 2024 05:34:16 UTC
<!-- end of auto-generated comment: Cypress test results -->
## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [x] No
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Introduced a new `LoadShifter` helper class for improved thread
scheduling in reactive programming.
- Enhanced asynchronous operations in various services using elastic and
parallel scheduling mechanisms.
- **Bug Fixes**
- Updated scheduling strategies in services to improve performance and
responsiveness under varying loads.
- **Chores**
- Streamlined dependency management by removing unnecessary `Scheduler`
parameters and dependencies in multiple classes.
- **Tests**
- Refined test setups by removing unused `Scheduler` and `CommonConfig`
mock beans for cleaner test definitions.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Nilesh Sarupriya <20905988+nsarupr@users.noreply.github.com>
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