ci: partition bench codspeed job (#20332)

Co-authored-by: Matthias Seitz <matthias.seitz@outlook.de>

.github/workflows/bench.yml

@@ -17,6 +17,16 @@ name: bench
 jobs:
   codspeed:
     runs-on: depot-ubuntu-latest
+    strategy:
+      matrix:
+        partition: [1, 2]
+        total_partitions: [2]
+        include:
+          - partition: 1
+            crates: "-p reth-primitives -p reth-trie-common -p reth-trie-sparse"
+          - partition: 2
+            crates: "-p reth-trie"
+    name: codspeed (${{ matrix.partition }}/${{ matrix.total_partitions }})
     steps:
       - uses: actions/checkout@v6
         with:
@@ -32,10 +42,10 @@ jobs:
         with:
           tool: cargo-codspeed
       - name: Build the benchmark target(s)
-        run: ./.github/scripts/codspeed-build.sh
+        run: cargo codspeed build --profile profiling --features test-utils ${{ matrix.crates }}
       - name: Run the benchmarks
         uses: CodSpeedHQ/action@v4
         with:
-          run: cargo codspeed run --workspace
+          run: cargo codspeed run ${{ matrix.crates }}
           mode: instrumentation
           token: ${{ secrets.CODSPEED_TOKEN }}