## Description
Created a pre delete hook to delete datasource files on Appsmith AI
server when datasource is deleted in Appsmith instance.
#### PR fixes following issue(s)
Fixes https://github.com/appsmithorg/appsmith-ee/issues/3617
#### How Has This Been Tested?
- [x] Manual
## Automation
/ok-to-test tags="@tag.Datasource"
## Checklist:
#### Dev activity
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] PR is being merged under a feature flag
#### QA activity:
- [ ] [Speedbreak
features](https://github.com/appsmithorg/TestSmith/wiki/Guidelines-for-test-plans#speedbreakers-)
have been covered
- [ ] Test plan covers all impacted features and [areas of
interest](https://github.com/appsmithorg/TestSmith/wiki/Guidelines-for-test-plans#areas-of-interest-)
- [ ] Test plan has been peer reviewed by project stakeholders and other
QA members
- [ ] Manually tested functionality on DP
- [ ] We had an implementation alignment call with stakeholders post QA
Round 2
- [ ] Cypress test cases have been added and approved by SDET/manual QA
- [ ] Added `Test Plan Approved` label after Cypress tests were reviewed
- [ ] Added `Test Plan Approved` label after JUnit tests were reviewed
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Introduced a new method `preDeleteHook` in the `PluginExecutor`
interface to serve as a hook after deleting a datasource.
- Added a new method `disassociateDatasource` in the AI plugin to notify
the AI server about datasource deletion and provide file context if
available.
- **Refactor**
- Enhanced the AI plugin by refactoring methods to use a new
`createAssociateDTO` method for generating `AssociateDTO` instances,
improving code readability and maintainability.
- **Chores**
- Updated the `archiveById` method in DatasourceServiceCEImpl to include
a `flatMap` operation that triggers a `preDeleteHook` method on the
plugin executor before archiving the datasource. Also added a new
private method `findPluginExecutor` for retrieving the plugin executor.
<!-- end of auto-generated comment: release notes by coderabbit.ai
--><!-- This is an auto-generated comment: Cypress test results -->
> [!IMPORTANT]
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/8338230830>
> Commit: `800915ea99c93663af34d08e8bcf4a14ad1356d0`
> Cypress dashboard url: <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=8338230830&attempt=2"
target="_blank">Click here!</a>
> All cypress tests have passed 🎉🎉🎉
<!-- end of auto-generated comment: Cypress test results -->
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