## Description
PR to fix the issue with DB url update from admin settings page. When we
migrated the env variable to `APPSMITH_DB_URL` instead of
`APPSMITH_MONGODB_URI` this functionality broke. We had a discussion to
remove this update functionality as this does not work in all the
setups. But as QA has already started pointing this as an issue raising
this PR.
## Automation
/ok-to-test tags="@tag.Settings"
### 🔍 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/10297374384>
> Commit: dbef20ca923a1cba0d7687766481060eab5057fa
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=10297374384&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Settings`
> Spec:
> <hr>Thu, 08 Aug 2024 07:13:51 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**
- Updated the database connection string naming from "MongoDB URI" to
"Appsmith DB URL" in the Admin Settings, enhancing clarity in
configuration.
- Revised subtext in Admin Settings for improved user understanding of
the database URL's purpose.
- **Bug Fixes**
- Adjusted test cases to reflect the new naming convention, ensuring
consistent references to "APPSMITH_DB_URL" across various tests.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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