[TASK] Add language to download button in Install Tool

Add the language iso code to the download buttons in the Install Tool >
Manage Language Packs to improve the usability if more languages are
available.

Resolves: #108184
Releases: main, 13.4
Change-Id: Ic9edcef810f33c9e12904931764b69e770ec0e1c
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/91758
Tested-by: Garvin Hicking <garvin@hick.ing>
Reviewed-by: Garvin Hicking <garvin@hick.ing>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>

Author: georgringer

Build/Sources/TypeScript/install/renderable/language-packs.ts

@@ -279,6 +279,7 @@ export class ExtensionMatrixElement extends LitElement {
             <button class="btn btn-default" title=${tooltip}
               @click=${() => this.dispatchEvent(new CustomEvent<DownloadPacksEvent>('download-packs', eventData))}>
               <typo3-backend-icon identifier="actions-download" size="small"></typo3-backend-icon>
+              ${language}
             </button>
           </td>
         `;