fix(ADA-1734): Continues ADA-1500, Converting labels to string v2 (#64)

**With:**
kaltura/playkit-js-moderation#95

**Issue:**:
Previous JSX was not translated when loaded in the ui-managers
This was causing aria-label to be rendered: [Object object]:

![image](https://github.com/user-attachments/assets/aecff15e-77a8-4534-96cb-e258e7bc5319)

 
**Fix**:
Used "preact-render-to-string" library to convert the JSX to string

package.json

@@ -104,6 +104,7 @@
     "name": "uiManagers"
   },
   "dependencies": {
-    "@playkit-js/common": "1.5.18"
+    "@playkit-js/common": "1.5.18",
+    "preact-render-to-string": "^6.5.11"
   }
 }

src/services/upper-bar-manager/ui/dropdown-bar-item/dropdown-bar-item.tsx

@@ -1,6 +1,7 @@
 import { h, Fragment, VNode } from 'preact';
 import { useState, useRef, useLayoutEffect } from 'preact/hooks';
 import * as styles from './dropdown-bar-item.scss';
+import { renderToString } from 'preact-render-to-string';
 import { ui } from '@playkit-js/kaltura-player-js';
 import { A11yWrapper } from '@playkit-js/common/dist/hoc/a11y-wrapper';
 import { SvgIcon } from '../../models/svg-icon';
@@ -58,6 +59,8 @@ const DropdownBarItem = ({ displayName, text, icon, onClick, onDropdownClick, to
     textElement
   );
 
+  const textString = typeof text === 'string' ? text : renderToString(text);
+
   const renderContent = (): VNode => {
     return (
       <A11yWrapper
@@ -67,7 +70,7 @@ const DropdownBarItem = ({ displayName, text, icon, onClick, onDropdownClick, to
         }}
         role="menuitem"
       >
-        <div className={styles.dropdownItem} tabIndex={0} aria-label={text}>
+        <div className={styles.dropdownItem} tabIndex={0} aria-label={textString}>
           <div className={styles.icon}>{renderIcon()}</div>
           {content}
         </div>

yarn.lock

@@ -5541,6 +5541,11 @@ preact-i18n@^2.0.0-preactx.2:
   dependencies:
     dlv "^1.1.2"
 
+preact-render-to-string@^6.5.11:
+  version "6.5.11"
+  resolved "https://registry.npmjs.org/preact-render-to-string/-/preact-render-to-string-6.5.11.tgz#467e69908a453497bb93d4d1fc35fb749a78e027"
+  integrity sha512-ubnauqoGczeGISiOh6RjX0/cdaF8v/oDXIjO85XALCQjwQP+SB4RDXXtvZ6yTYSjG+PC1QRP2AhPgCEsM2EvUw==
+
 preact@^10.0.0:
   version "10.13.2"
   resolved "https://registry.yarnpkg.com/preact/-/preact-10.13.2.tgz#2c40c73d57248b57234c4ae6cd9ab9d8186ebc0a"