fix: Quick fixes for current state of Plugin Action Editor (#36574)

## Description

Fixes null values crashes in Plugin Action Editor


## Automation

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

### 🔍 Cypress test results
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> [!CAUTION]  
> If you modify the content in this section, you are likely to disrupt
the CI result for your PR.

<!-- end of auto-generated comment: Cypress test results  -->


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

app/client/src/PluginActionEditor/components/PluginActionForm/PluginActionForm.tsx

@@ -2,13 +2,18 @@ import React from "react";
 import APIEditorForm from "./components/APIEditorForm";
 import { Flex } from "@appsmith/ads";
 import { useChangeActionCall } from "./hooks/useChangeActionCall";
+import { usePluginActionContext } from "../../PluginActionContext";
+import { UIComponentTypes } from "api/PluginApi";
 
 const PluginActionForm = () => {
   useChangeActionCall();
+  const { plugin } = usePluginActionContext();
 
   return (
     <Flex p="spaces-2" w="100%">
-      <APIEditorForm />
+      {plugin.uiComponent === UIComponentTypes.ApiEditorForm ? (
+        <APIEditorForm />
+      ) : null}
     </Flex>
   );
 };

app/client/src/PluginActionEditor/components/PluginActionForm/components/CommonEditorForm/hooks/useGetFormActionValues.ts

@@ -18,7 +18,7 @@ function useGetFormActionValues() {
 
   // In an unlikely scenario where form is not initialised,
   // return empty values to avoid form ui issues
-  if (!isAPIAction(formValues)) {
+  if (!formValues || !isAPIAction(formValues)) {
     return {
       actionHeaders: [],
       actionParams: [],

app/client/src/PluginActionEditor/components/PluginActionResponse/PluginActionResponse.tsx

@@ -57,7 +57,7 @@ function PluginActionResponse() {
         expandedHeight={`${ActionExecutionResizerHeight}px`}
         isCollapsed={!open}
         onSelect={updateSelectedResponseTab}
-        selectedTabKey={selectedTab || tabs[0].key}
+        selectedTabKey={selectedTab || tabs[0]?.key}
         tabs={tabs}
       />
     </IDEBottomView>