chore: fix agent creation bug (#40251)

/ok-to-test tags="@tag.Templates"
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Added filtering of templates based on the AI agent flow setting,
showing only relevant templates when enabled.

- **Refactor**
- Improved consistency in template filtering across the app by updating
related selectors.

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

<!-- This is an auto-generated comment: Cypress test results  -->
> [!TIP]
> 🟢 🟢 🟢 All cypress tests have passed! 🎉 🎉 🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/14465699770>
> Commit: 7050a8bfff005c645f72b007415bc331140374c0
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=14465699770&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Templates`
> Spec:
> <hr>Tue, 15 Apr 2025 09:31:34 UTC
<!-- end of auto-generated comment: Cypress test results  -->

app/client/src/selectors/templatesSelectors.tsx

@@ -28,7 +28,10 @@ const fuzzySearchOptions = {
 const AGENT_TEMPLATES_USE_CASE = "Agent";
 const AGENT_TEMPLATES_TITLE = "AI Agent";
 
-export const getTemplatesSelector = createSelector(
+export const getTemplatesSelector = (state: AppState) =>
+  state.ui.templates.templates;
+
+export const getTemplatesByFlagSelector = createSelector(
   (state: AppState) => state.ui.templates.templates,
   getIsAiAgentFlowEnabled,
   (templates, isAiAgentFlowEnabled) => {
@@ -124,7 +127,7 @@ export const getBuildingBlockExplorerCards = createSelector(
 );
 
 export const getFilteredTemplateList = createSelector(
-  getTemplatesSelector,
+  getTemplatesByFlagSelector,
   getTemplateFilterSelector,
   getTemplateFiltersLength,
   (templates, templatesFilters, numberOfFiltersApplied) => {
@@ -188,7 +191,7 @@ export const getSearchedTemplateList = createSelector(
 
 // Get the list of datasources which are used by templates
 export const templatesDatasourceFiltersSelector = createSelector(
-  getTemplatesSelector,
+  getTemplatesByFlagSelector,
   getDefaultPlugins,
   (templates, plugins) => {
     const datasourceFilters: Filter[] = [];
@@ -224,7 +227,7 @@ export const allTemplatesFiltersSelector = (state: AppState) =>
 // Get all filters which is associated with atleast one template
 // If no template is associated with a filter, then the filter shouldn't be in the filter list
 export const getFilterListSelector = createSelector(
-  getTemplatesSelector,
+  getTemplatesByFlagSelector,
   allTemplatesFiltersSelector,
   (templates, allTemplateFilters) => {
     const FUNCTIONS_FILTER = "functions";