ci: build test binaries once, share them across shard jobs (#11981)

* ci: build test binaries once, share them across shard jobs

Each of the 6 rust-volume-go-tests shards, the rust-integration-tests
job, and the 6 volume-server-integration-tests shards rebuilt the same
weed and weed-volume binaries — 13 duplicate builds per run. A
build-test-binaries / build-weed job now compiles them once under the
existing cargo cache and publishes them as artifacts; the consumers
download and chmod them instead of building.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* ci: preserve binary paths through the artifact round-trip

upload-artifact stores single files flat, so weed/weed would come back
at the workspace root and the consumers' expected paths break. Pack the
binaries in a tar before upload and extract on download.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* ci: extract the shared test binaries in the rust go-test shards

The download step leaves rust-test-binaries.tar at the workspace root;
without untarring it the chmod fails on missing files and every shard
fails before running a test.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

---------

Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

.github/workflows/volume-server-integration-tests.yml

@@ -33,15 +33,10 @@ env:
   SHARD_COUNT: 3
 
 jobs:
-  volume-server-integration-tests:
-    name: Volume Server Integration Tests (${{ matrix.test-type }} - Shard ${{ matrix.shard }})
+  build-weed:
+    name: Build SeaweedFS Binary
     runs-on: ubuntu-22.04
-    timeout-minutes: 45
-    strategy:
-      fail-fast: false
-      matrix:
-        test-type: [grpc, http]
-        shard: [1, 2, 3]
+    timeout-minutes: 15
 
     steps:
       - name: Checkout code
@@ -59,6 +54,48 @@ jobs:
           chmod +x weed
           ./weed version
 
+      - name: Package binary
+        run: tar cf weed-binary.tar weed/weed
+
+      - name: Upload binary
+        uses: actions/upload-artifact@v7
+        with:
+          name: weed-binary
+          if-no-files-found: error
+          retention-days: 1
+          path: weed-binary.tar
+
+  volume-server-integration-tests:
+    name: Volume Server Integration Tests (${{ matrix.test-type }} - Shard ${{ matrix.shard }})
+    runs-on: ubuntu-22.04
+    timeout-minutes: 45
+    needs: [build-weed]
+    strategy:
+      fail-fast: false
+      matrix:
+        test-type: [grpc, http]
+        shard: [1, 2, 3]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v7
+
+      - name: Set up Go
+        uses: actions/setup-go@v7
+        with:
+          go-version-file: 'go.mod'
+
+      - name: Download binary
+        uses: actions/download-artifact@v7
+        with:
+          name: weed-binary
+
+      - name: Restore binary
+        run: |
+          tar xf weed-binary.tar
+          chmod +x weed/weed
+          ./weed/weed version
+
       # Dealing the listed tests out one by one keeps the shards even. Bucketing
       # them by first letter did not: names cluster, so ^Test[I-S] drew 50 of
       # the 114 grpc tests and ran nearly twice as long as the other two shards.