ci : refactor (#23789)

* ci : separate CUDA windows workflow + fix names

* ci : rename workflow

* ci : prefix cache names with workflow name

* ci : rename build.yml -> build-cpu.yml

* ci : cache keys

* ci : fix windows cuda/hip concurrency of release workflow

* ci : fix apple cache names

* ci : add TODOs

* cont : keep just the last cache

* ci : update release concurrency to queue

* ci : move the release trigger to ubuntu-slim

* ci : hip add TODO

* cont : improve words

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>

.github/workflows/server.yml

@@ -55,7 +55,7 @@ concurrency:
 
 jobs:
   ubuntu:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
 
     name: ubuntu (${{ matrix.wf_name }})
     strategy:
@@ -96,7 +96,7 @@ jobs:
       - name: ccache
         uses: ggml-org/ccache-action@v1.2.21
         with:
-          key: server-ubuntu-default
+          key: server-ubuntu-24.04-x64
           evict-old-files: 1d
           save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
@@ -144,7 +144,7 @@ jobs:
       - name: ccache
         uses: ggml-org/ccache-action@v1.2.21
         with:
-          key: server-windows-default
+          key: server-windows-2025-x64
           evict-old-files: 1d
           save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}