## Description
A few users noticed that Appsmith was creating surplus connections in
their database even when connected through a single datasource. Ideally,
this number should start from 5 and not exceed beyond total concurrent
requests in the app/workspace. However, it seems like HikariCP tends to
send the following query outside of the connection pool size for every
query that we try to run.
```
SET application_name = 'PostreSQL JDBC Driver'
```
This PR has introduced a custom set application name to all connections
to avoid sending this set query along with every execution request,
according to this
[post](https://seethawenner.medium.com/improve-the-performance-of-your-aws-rds-postgres-database-by-avoiding-session-pinning-a4f010109bed).
Unfortunately, while this solution has lowered the number of such set
queries, they have not disappeared entirely. There is another
alternative [here](https://github.com/appsmithorg/appsmith/pull/21780)
that requires us to let users know about minimum version support for PG
so we will not be opting for that solution at this time.
Fixes#14117
## Type of change
- Bug fix (non-breaking change which fixes an issue)
## How Has This Been Tested?
- Manual
- JUnit
### Test Plan
> Add Testsmith test cases links that relate to this PR
### Issues raised during DP testing
> Link issues raised during DP testing for better visiblity and tracking
(copy link from comments dropped on this PR)
## Checklist:
### Dev activity
- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] PR is being merged under a feature flag
### QA activity:
- [ ] Test plan has been approved by relevant developers
- [ ] Test plan has been peer reviewed by QA
- [ ] Cypress test cases have been added and approved by either SDET or
manual QA
- [ ] Organized project review call with relevant stakeholders after
Round 1/2 of QA
- [ ] Added Test Plan Approved label after reveiwing all Cypress test
c8c80cfbbd