feat: remove release_paid_features_tagging feature flag (#41123)

## Summary

This PR removes the `release_paid_features_tagging` feature flag and
enables premium tagging for paid datasource features by default.

## Changes Made

### Files Modified
- `app/client/src/ce/entities/FeatureFlag.ts` - Removed feature flag
definition
- `app/client/src/pages/Editor/DataSidePane/DataSidePane.tsx` - Removed
feature flag usage

### Detailed Changes
1. **Removed feature flag definition**:
   - Removed `release_paid_features_tagging` from `FEATURE_FLAG` object
- Removed corresponding default value from `DEFAULT_FEATURE_FLAG_VALUE`

2. **Updated DataSidePane component**:
- Removed `useFeatureFlag(FEATURE_FLAG.release_paid_features_tagging)`
hook
- Removed conditional check `if (!isPaidFeaturesTaggingEnabled) return
false;`
- Updated `shouldShowPremiumTag` function to always evaluate premium tag
logic
   - Cleaned up dependency array in useMemo

## Impact

- Premium tags for paid datasource features will now be **always
visible** when applicable
- Removes the feature flag gating mechanism that was previously
controlling this behavior
- Simplifies the codebase by removing conditional logic around premium
tagging

## Automation

/ok-to-test tags="@tag.Sanity, @tag.IDE, @tag.Datasource"

### 🔍 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/16435603085>
> Commit: 2db1a7337cb167f87f10de1a8e9a7513303427a5
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=16435603085&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Sanity, @tag.IDE, @tag.Datasource`
> Spec:
> <hr>Tue, 22 Jul 2025 06:41:49 UTC
<!-- end of auto-generated comment: Cypress test results  -->


## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [ ] No


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Refactor**
* Removed the feature flag for paid features tagging and all related
logic from the application.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

app/client/src/ce/entities/FeatureFlag.ts

@@ -64,7 +64,6 @@ export const FEATURE_FLAG = {
     "release_jsobjects_onpageunloadactions_enabled",
   configure_block_event_tracking_for_anonymous_users:
     "configure_block_event_tracking_for_anonymous_users",
-  release_paid_features_tagging: "release_paid_features_tagging",
 } as const;
 
 export type FeatureFlag = keyof typeof FEATURE_FLAG;
@@ -117,7 +116,6 @@ export const DEFAULT_FEATURE_FLAG_VALUE: FeatureFlags = {
   license_ai_agent_instance_enabled: false,
   release_jsobjects_onpageunloadactions_enabled: false,
   configure_block_event_tracking_for_anonymous_users: false,
-  release_paid_features_tagging: false,
 };
 
 export const AB_TESTING_EVENT_KEYS = {

app/client/src/pages/Editor/DataSidePane/DataSidePane.tsx

@@ -83,9 +83,6 @@ export const DataSidePane = (props: DataSidePaneProps) => {
   );
 
   const isFeatureEnabled = useFeatureFlag(FEATURE_FLAG.license_gac_enabled);
-  const isPaidFeaturesTaggingEnabled = useFeatureFlag(
-    FEATURE_FLAG.release_paid_features_tagging,
-  );
 
   const canCreateDatasource = getHasCreateDatasourcePermission(
     isFeatureEnabled,
@@ -113,8 +110,6 @@ export const DataSidePane = (props: DataSidePaneProps) => {
 
   const shouldShowPremiumTag = useCallback(
     (datasource: Datasource) => {
-      if (!isPaidFeaturesTaggingEnabled) return false;
-
       const plugin = plugins.find((p) => p.id === datasource.pluginId);
 
       if (!plugin) return false;
@@ -128,7 +123,7 @@ export const DataSidePane = (props: DataSidePaneProps) => {
 
       return false;
     },
-    [plugins, isIntegrationsEnabledForPaid, isPaidFeaturesTaggingEnabled],
+    [plugins, isIntegrationsEnabledForPaid],
   );
 
   return (