ci: increased ci chunk size and removed (chunk ${{ matrix.chunk }}) in build extensions from name

.github/workflows/build_pull_request.yml

@@ -13,7 +13,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  CI_CHUNK_SIZE: 65
+  CI_CHUNK_SIZE: 288
 
 jobs:
   prepare:
@@ -86,7 +86,7 @@ jobs:
             build-cache-${{ github.event.pull_request.base.sha }}-
             build-cache-
 
-      - name: Build extensions (chunk ${{ matrix.chunk }})
+      - name: Build extensions
         env:
           CI_CHUNK_NUM: ${{ matrix.chunk }}
         run: chmod +x ./gradlew && ./gradlew -p src assembleDebug