## Description
With current implementation, MSSQL is configured with HikariCP to have
maximum pool size of 10. But this means that if multiple concurrent
users are accessing multiple queries of the same datasource at the same
time, some of the queries might time out due to max pool size of 10. We
have encountered this issue in
https://theappsmith.slack.com/archives/C0341RERY4R/p1736150680663059.
Where 40-50 concurrent users are simultaneously making 20-30 queries to
MSSQL database.
This PR makes this connection pool size configurable from admin settings
for MSSQL as well.
Fixes #https://github.com/appsmithorg/appsmith-ee/issues/5928
_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.All"
### 🔍 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/12925650660>
> Commit: ebda9364200b4df19c86b8ec4e68a95d6180f10c
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=12925650660&attempt=2"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.All`
> Spec:
> <hr>Thu, 23 Jan 2025 11:18:35 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**
- Enhanced connection pool configuration for MSSQL plugin
- Added support for dynamically setting maximum connection pool size
- **Improvements**
- Increased flexibility in database connection management
- Implemented configurable connection pool settings
- **Tests**
- Added mock configuration for testing connection pool settings
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Co-authored-by: “sneha122” <“sneha@appsmith.com”>
b7c06d6c60