chore(ci): Use newest SMP version (#22004)

* Updates smp-cli to use latest version

* Fixes incorrect env var substitution in regression workflow

.github/workflows/regression.yml

@@ -105,7 +105,7 @@ jobs:
       - name: Set SMP version
         id: experimental-meta
         run: |
-          export SMP_CRATE_VERSION="0.16.1"
+          export SMP_CRATE_VERSION="0.19.3"
           echo "smp crate version: ${SMP_CRATE_VERSION}"
           echo "SMP_CRATE_VERSION=${SMP_CRATE_VERSION}" >> $GITHUB_OUTPUT
 
@@ -407,7 +407,7 @@ jobs:
             --target-config-dir ${{ github.workspace }}/regression/ \
             --warmup-seconds ${{ env.SMP_WARMUP_SECONDS }} \
             --submission-metadata ${{ runner.temp }}/submission-metadata \
-            --replicas {{ env.SMP_REPLICAS }}
+            --replicas ${{ env.SMP_REPLICAS }}
 
       - uses: actions/upload-artifact@v4
         with: