add script to start benchmarking

Co-authored-by: James Cor <james@dolthub.com>

.github/workflows/sysbench-performance.yaml

@@ -0,0 +1,28 @@
+name: Benchmark Mini Sysbench Performance on PR
+
+on:
+  pull_request:
+    paths:
+      - 'go/**'
+    branches: [ main ]
+
+jobs:
+  performance:
+    runs-on: ubuntu-22.04
+    name: Trigger Benchmark Latency K8s Workflow
+    steps:
+      - uses: dolthub/pull-request-comment-branch@v3
+        id: comment-branch
+        with:
+          repo_token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Get pull number
+        uses: actions/github-script@v7
+        id: get_pull_number
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: core.setOutput("pull_number", JSON.stringify(context.issue.number));
+      - uses: peter-evans/repository-dispatch@v3
+        with:
+          token: ${{ secrets.REPO_ACCESS_TOKEN }}
+          event-type: benchmark-latency
+          client-payload: '{"from_server": "dolt", "from_version": "${{ github.sha }}", "to_server": "dolt", "to_version": "${{ steps.comment-branch.outputs.head_sha }}", "mode": "pullRequest", "issue_number": "${{ steps.get_pull_number.outputs.pull_number }}", "init_big_repo": "true", "actor": "${{ github.actor }}", "sysbench_test_time": "10", "template_script": "./.github/scripts/performance-benchmarking/get-dolt-dolt-job-json.sh"}'