fix: closedFn-undefined (#21264)

## Description

Fixing the typo related to function name.

Fixes https://github.com/appsmithorg/appsmith-ee/issues/1172

Media


## Type of change

> Please delete options that are not relevant.

- Bug fix (non-breaking change which fixes an issue)
- New feature (non-breaking change which adds functionality)
- Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- Chore (housekeeping or task changes that don't impact user perception)
- This change requires a documentation update


## How Has This Been Tested?
> Please describe the tests that you ran to verify your changes. Provide
instructions, so we can reproduce.
> Please also list any relevant details for your test configuration.
> Delete anything that is not important

- Manual
- Jest
- Cypress

### 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

---------

Co-authored-by: Shrikant Sharat Kandula <shrikantsharat.k@gmail.com>

app/client/src/workers/Evaluation/evaluate.ts

@@ -46,7 +46,7 @@ export const EvaluationScripts: Record<EvaluationScriptType, string> = {
   $$closedFn(${ScriptTemplate})
   `,
   [EvaluationScriptType.ASYNC_ANONYMOUS_FUNCTION]: `
-  async function callback (script) {
+  async function $$closedFn (script) {
     const $$userFunction = script;
     const $$result = $$userFunction?.apply(THIS_CONTEXT, ARGUMENTS);
     return await $$result;