ci: remove redundant or duplicate jobs (#23927)

* remove redundant apple job

openvino gpu and cpu test can share the same build and machine

Update build-rpc.yml

Update build-openvino.yml

cpu any doesnt make sense as we have an arm job already, so do high perf on both x86 and arm

remove duplicate x86 vulkan

combine backend sampling

Update server.yml

run server on arm as windows is x86

* emdawn on one machine only

* fix openvino, remove cpu tag as we dont have many x64 machines with that tag

.github/workflows/build-webgpu.yml

@@ -130,15 +130,7 @@ jobs:
           ctest -L main -E test-backend-ops --verbose --timeout 900
 
   ubuntu-wasm:
-    strategy:
-      matrix:
-        include:
-          - build: 'x64'
-            os: ubuntu-24.04
-          - build: 'arm64'
-            os: ubuntu-24.04-arm
-
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-24.04-arm
 
     steps:
       - name: Clone
@@ -148,7 +140,7 @@ jobs:
       - name: ccache
         uses: ggml-org/ccache-action@v1.2.21
         with:
-          key: webgpu-${{ matrix.os }}-wasm
+          key: webgpu-ubuntu-24.04-arm-wasm
           evict-old-files: 1d
           save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}