feat: added support for conditional tabs (#8720)

Adds support for conditional tabs.

You can now add a `condition` function like other fields to each
individual tab's admin config like so:

```ts
{
  name: 'contentTab',
  admin: {
    condition: (data) => Boolean(data?.enableTab)
  }
}
```

This will toggle the individual tab's visibility in the document listing

### Example


https://github.com/user-attachments/assets/45cf9cfd-eaed-4dfe-8a32-1992385fd05c

This is an updated PR from
https://github.com/payloadcms/payload/pull/8406 thanks to @willviles

---------

Co-authored-by: Will Viles <will@willviles.com>
Co-authored-by: Jarrod Flesch <jarrodmflesch@gmail.com>

test/fields/payload-types.ts

@@ -1831,6 +1831,19 @@ export interface TabsField {
    * This should not collapse despite there being many tabs pushing the main fields open.
    */
   sidebarField?: string | null;
+  /**
+   * When active, the conditional tab should be visible. When inactive, it should be hidden.
+   */
+  conditionalTabVisible?: boolean | null;
+  conditionalTab?: {
+    conditionalTabField?: string | null;
+    /**
+     * When active, the nested conditional tab should be visible. When inactive, it should be hidden.
+     */
+    nestedConditionalTabVisible?: boolean | null;
+    nestedUnconditionalTabInput?: string | null;
+    nestedConditionalTabInput?: string | null;
+  };
   array: {
     text: string;
     id?: string | null;
@@ -3452,6 +3465,15 @@ export interface TabsFields2Select<T extends boolean = true> {
  */
 export interface TabsFieldsSelect<T extends boolean = true> {
   sidebarField?: T;
+  conditionalTabVisible?: T;
+  conditionalTab?:
+    | T
+    | {
+        conditionalTabField?: T;
+        nestedConditionalTabVisible?: T;
+        nestedUnconditionalTabInput?: T;
+        nestedConditionalTabInput?: T;
+      };
   array?:
     | T
     | {