chore: feature flag value updated for gsheets (#21391)

## Description

This PR updates the feature flag for Limiting Gsheet Access project,
earlier the feature flag was added for appsmith and moolya domain users,
but now it is updated to only for account integrations@appsmith.com

> Add a TL;DR when description is extra long (helps content team)

Fixes https://github.com/appsmithorg/appsmith/issues/21390


Media
> A video or a GIF is preferred. when using Loom, don’t embed because it
looks like it’s a GIF. instead, just link to the video


## Type of change

- Chore (housekeeping or task changes that don't impact user perception)


## How Has This Been Tested?

- Manual

### 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
- [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
- [ ] I have made corresponding changes to the documentation
- [x] 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
- [x] 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: “sneha122” <“sneha@appsmith.com”>

app/server/appsmith-server/src/main/resources/features/init-flags.yml

@@ -95,8 +95,8 @@ ff4j:
       flipstrategy:
         class: com.appsmith.server.featureflags.strategies.EmailBasedRolloutStrategy
         param:
-          - name: emailDomains
-            value: appsmith.com,moolya.com
+          - name: emails
+            value: integrations@appsmith.com
 
     # Put EE flags below this line, to avoid conflicts.
     - uid: RBAC